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Scala Interview Questions and Answers

1) What is Scala?Scala is a general-purpose programming language. It supports object-oriented, functional and imperative programming approaches. It is a strong static type language. In Scala, everything is an object whether it is a function or a number. It was designed by Martin Odersky in 2004.Scala Program Exampleobject MainObject{ def main(args:Array[String]){ print("Hello Scala") } } For more information: Click here.2) What are the features of Scala?There are following features in Scala:Type inference: In Scala, you don't require to mention data type and function return type explicitly.Singleton object: Scala uses a singleton object, which is essentially class with only one object in the source file.Immutability: Scala uses immutability concept. Immutable data helps to manage concurrency control which requires managing data.Lazy computation: In Scala, computation is lazy by default. You can declare a lazy variable by using the lazy keyword. It is used to increase performance.Case classes and Pattern matching: In Scala, case classes support pattern matching. So, you can write more logical code.Concurrency control: Scala provides a standard library which includes the actor model. You can write concurrency code by using the actor.String interpolation: In Scala, string interpolation allows users to embed variable references directly in processed string literals.Higher order function: In Scala, higher order function allows you to create function composition, lambda function or anonymous function, etc.Traits: A trait is like an interface with partial implementation. In Scala, the trait is a collection of abstract and non-abstract methods.Rich set of collection: Scala provides a rich set of collection library. It contains classes and traits to collect data. These collections can be mutable or immutable.For more information: Click here.24.7M339Triggers in SQL (Hindi)NextStay3) What are the Data Types in Scala?Data types in Scala are much similar to Java regarding their storage, length, except that in Scala there is no concept of primitive data types every type is an object and starts with capital letter. A table of data types is given below.Data Types in ScalaData TypeDefault ValueSizeBooleanFalseTrue or falseByte08 bit signed value (-27 to 27-1)Short016 bit signed value(-215 to 215-1)Char'\u0000'16 bit unsigned Unicode character(0 to 216-1)Int032 bit signed value(-231 to 231-1)Long0L64 bit signed value(-263 to 263-1)Float0.0F32 bit IEEE 754 single-precision floatDouble0.0D64 bit IEEE 754 double-precision floatStringNullA sequence of charactersFor more information: Click here.4) What is pattern matching?Pattern matching is a feature of Scala. It works same as switch case in other languages. It matches the best case available in the pattern.Exampleobject MainObject { def main(args: Array[String]) { var a = 1 a match{ case 1 => println("One") case 2 => println("Two") case _ => println("No") } } } For more information: Click here.5) What is for-comprehension in Scala?In Scala, for loop is known as for-comprehensions. It can be used to iterate, filter and return an iterated collection. The for-comprehension looks a bit like a for-loop in imperative languages, except that it constructs a list of the results of all iterations.Exampleobject MainObject { def main(args: Array[String]) { for( a 7) How to declare a function in Scala?In Scala, functions are first-class values. You can store function value, pass a function as an argument and return function as a value from other function. You can create a function by using the def keyword. You must mention return type of parameters while defining a function and return type of a function is optional. If you don't specify the return type of a function, default return type is Unit.Scala Function Declaration Syntaxdef functionName(parameters : typeofparameters) : returntypeoffunction = { // statements to be executed } For more information: Click here.8) Why do we use =(equal) operator in Scala function?You can create a function with or without = (equal) operator. If you use it, the function will return value. If you don't use it, your function will not return anything and will work like the subroutine.Exampleobject MainObject { def main(args: Array[String]) { var result = functionExample() // Calling function println(result) } def functionExample() = { // Defining a function var a = 10 a } } For more information: Click here.9) What is the Function parameter with a default value in Scala?Scala provides a feature to assign default values to function parameters. It helps in the scenario when you don't pass value during function calls. It uses default values of parameters.Exampleobject MainObject { def main(args: Array[String]) = { var result1 = functionExample(15,2) // Calling with two values var result2 = functionExample(15) // Calling with one value var result3 = functionExample() // Calling without any value println(result1+"\n"+result2+"\n"+result3) } def functionExample(a:Int = 0, b:Int = 0):Int = { // Parameters with default values as 0 a+b } } For more information: Click here.10) What is a function named parameter in Scala?In Scala function, you can specify the names of parameters while calling the function. You can pass named parameters in any order and can also pass values only.Exampleobject MainObject { def main(args: Array[String]) = { var result1 = functionExample(a = 15, b = 2) // Parameters names are passed during call var result2 = functionExample(b = 15, a = 2) // Parameters order have changed during call var result3 = functionExample(15,2) // Only values are passed during call println(result1+"\n"+result2+"\n"+result3) } def functionExample(a:Int, b:Int):Int = { a+b } } For more information: Click here.11) What is a higher order function in Scala?Higher order function is a function that either takes a function as an argument or returns a function. In other words, we can say a function which works with function is called a higher-order function.Exampleobject MainObject { def main(args: Array[String]) = { functionExample(25, multiplyBy2) // Passing a function as parameter } def functionExample(a:Int, f:Int=>AnyVal):Unit = { println(f(a)) // Calling that function } def multiplyBy2(a:Int):Int = { a*2 } } For more information: Click here.12) What is function composition in Scala?In Scala, functions can be composed from other functions. It is a process of composing in which a function represents the application of two composed functions.Exampleobject MainObject { def main(args: Array[String]) = { var result = multiplyBy2(add2(10)) // Function composition println(result) } def add2(a:Int):Int = { a+2 } def multiplyBy2(a:Int):Int = { a*2 } } For more information: Click here.13) What is Anonymous (lambda) Function in Scala?An anonymous function is a function that has no name but works as a function. It is good to create an anonymous function when you don't want to reuse it later. You can create anonymous function either by using ⇒ (rocket) or _ (underscore) wildcard in Scala.Exampleobject MainObject { def main(args: Array[String]) = { var result1 = (a:Int, b:Int) => a+b // Anonymous function by using => (rocket) var result2 = (_:Int)+(_:Int) // Anonymous function by using _ (underscore) wild card println(result1(10,10)) println(result2(10,10)) } } For more information: Click here.14) What is a multiline expression in Scala?Expressions those are written in multiple lines are called multiline expression. In Scala, be careful while using multiline expressions.Exampledef add1(a:Int, b:Int) = { a +b } The above program does not evaluate the complete expression and return b here.For more information: Click here.15) What is function currying in Scala?In Scala, the method may have multiple parameter lists. When a method is called with a fewer number of parameter lists, this will yield a function taking the missing parameter lists as its arguments.Exampleobject MainObject { def add(a:Int)(b:Int) = { a+b } def main(args: Array[String]) = { var result = add(10)(10) println("10 + 10 = "+result) var addIt = add(10)_ var result2 = addIt(3) println("10 + 3 = "+result2) } } For more information: Click here.16) What is a nexted function in Scala?In Scala, you can define the function of variable length parameters. It allows you to pass any number of arguments at the time of calling the function.Exampleobject MainObject { def add(a:Int, b:Int, c:Int) = { def add2(x:Int,y:Int) = { x+y } add2(a,add2(b,c)) } def main(args: Array[String]) = { var result = add(10,10,10) println(result) } } For more information: Click here.17) What is an object in Scala?The object is a real-world entity. It contains state and behavior. Laptop, car, cell phone are the real world objects. An object typically has two characteristics:1) State: data values of an object are known as its state.2) Behavior: functionality that an object performs is known as its behavior.The object in Scala is an instance of a class. It is also known as runtime entity.For more information: Click here.18) What is a class in Scala?The class is a template or a blueprint. It is also known as a collection of objects of similar type.In Scala, a class can contain:Data memberMember methodConstructorBlockNested classSuperclass information, etc.Exampleclass Student{ var id:Int = 0; // All fields must be initialized var name:String = null; } object MainObject{ def main(args:Array[String]){ var s = new Student() // Creating an object println(s.id+" "+s.name); } } For more information: Click here.19) What is an anonymous object in Scala?In Scala, you can create an anonymous object. An object which has no reference name is called an anonymous object. It is good to create an anonymous object when you don't want to reuse it further.Exampleclass Arithmetic{ def add(a:Int, b:Int){ var add = a+b; println("sum = "+add); } } object MainObject{ def main(args:Array[String]){ new Arithmetic().add(10,10); } } For more information: Click here.20) What is a constructor in Scala?In Scala, the constructor is not a special method. Scala provides primary and any number of auxiliary constructors. It is also known as default constructor.In Scala, if you don't specify a primary constructor, the compiler creates a default primary constructor. All the statements of the class body treated as part of the constructor.Scala Primary Constructor Exampleclass Student(id:Int, name:String){ def showDetails(){ println(id+" "+name); } } object MainObject{ def main(args:Array[String]){ var s = new Student(101,"Rama"); s.showDetails() } } For more information: Click here.21) What is method overloading in Scala?Scala provides method overloading feature which allows us to define methods of the same name but having different parameters or data types. It helps to optimize code. You can achieve method overloading either by using different parameter list or different types of parameters.Exampleclass Arithmetic{ def add(a:Int, b:Int){ var sum = a+b println(sum) } def add(a:Int, b:Int, c:Int){ var sum = a+b+c println(sum) } } object MainObject{ def main(args:Array[String]){ var a = new Arithmetic(); a.add(10,10); a.add(10,10,10); } } For more information: Click here.22) What is this in Scala?In Scala, this is a keyword and used to refer a current object. You can call instance variables, methods, constructors by using this keyword.Exampleclass ThisExample{ var id:Int = 0 var name: String = "" def this(id:Int, name:String){ this() this.id = id this.name = name } def show(){ println(id+" "+name) } } object MainObject{ def main(args:Array[String]){ var t = new ThisExample(101,"Martin") t.show() } } For more information: Click here.23) What is Inheritance?Inheritance is an object-oriented concept which is used to reusability of code. You can achieve inheritance by using extends keyword. To achieve inheritance, a class must extend to other class. A class which is extended called super or parent class. A class which extends class is called derived or base class.Exampleclass Employee{ var salary:Float = 10000 } class Programmer extends Employee{ var bonus:Int = 5000 println("Salary = "+salary) println("Bonus = "+bonus) } object MainObject{ def main(args:Array[String]){ new Programmer() } } For more information: Click here.24) What is method overriding in Scala?When a subclass has the same name method as defined in the parent class, it is known as method overriding. When subclass wants to provide a specific implementation for the method defined in the parent class, it overrides a method from the parent class.In Scala, you must use either override keyword or override annotation to override methods from the parent class.Exampleclass Vehicle{ def run(){ println("vehicle is running") } } class Bike extends Vehicle{ override def run(){ println("Bike is running") } } object MainObject{ def main(args:Array[String]){ var b = new Bike() b.run() } } For more information: Click here.25) What is final in Scala?Final keyword in Scala is used to prevent inheritance of super class members into the derived class. You can declare the final variable, method, and class also.Scala Final Variable Exampleclass Vehicle{ final val speed:Int = 60 } class Bike extends Vehicle{ override val speed:Int = 100 def show(){ println(speed) } } object MainObject{ def main(args:Array[String]){ var b = new Bike() b.show() } } For more information: Click here.26) What is the final class in Scala?In Scala, you can create a final class by using the final keyword. A final class can't be inherited. If you make a class final, it can't be extended further.Scala Final Class Examplefinal class Vehicle{ def show(){ println("vehicle is running") } } class Bike extends Vehicle{ override def show(){ println("bike is running") } } object MainObject{ def main(args:Array[String]){ var b = new Bike() b.show() } } For more information: Click here.27) What is an abstract class in Scala?A class which is declared with the abstract keyword is known as an abstract class. An abstract class can have abstract methods and non-abstract methods as well. An abstract class is used to achieve abstraction.Exampleabstract class Bike{ def run() } class Hero extends Bike{ def run(){ println("running fine...") } } object MainObject{ def main(args: Array[String]){ var h = new Hero() h.run() } } For more information: Click here.28) What is Scala Trait?A trait is like an interface with partial implementation. In Scala, the trait is a collection of abstract and non-abstract methods. You can create a trait that can have all abstract methods or some abstract and some non-abstract methods.Exampletrait Printable{ def print() } class A4 extends Printable{ def print(){ println("Hello") } } object MainObject{ def main(args:Array[String]){ var a = new A4() a.print() } } For more information: Click here.29) What is a trait mixins in Scala?In Scala, "trait mixins" means you can extend any number of traits with a class or abstract class. You can extend only traits or combination of traits and class or traits and abstract class.It is necessary to maintain the order of mixins otherwise compiler throws an error.Exampletrait Print{ def print() } abstract class PrintA4{ def printA4() } class A6 extends PrintA4 { def print(){ // Trait print println("print sheet") } def printA4(){ // Abstract class printA4 println("Print A4 Sheet") } } object MainObject{ def main(args:Array[String]){ var a = new A6() with Print // You can also extend trait during object creation a.print() a.printA4() } } For more information: Click here.30) What is the access modifier in Scala?Access modifier is used to define accessibility of data and our code to the outside world. You can apply accessibly to class, trait, data member, member method, and constructor, etc. Scala provides the least accessibility to access to all. You can apply any access modifier to your code according to your requirement.In Scala, there are only three types of access modifiers.No modifierProtectedPrivateFor more information: Click here31) What is an array in Scala?In Scala, the array is a combination of mutable values. It is an index based data structure. It starts from 0 index to n-1 where n is the length of the array.Scala arrays can be generic. It means, you can have an Array[T], where T is a type parameter or abstract type. Scala arrays are compatible with Scala sequences - you can pass an Array[T] where a Seq[T] is required. Scala arrays also support all the sequence operations.Exampleclass ArrayExample{ var arr = Array(1,2,3,4,5) // Creating single dimensional array def show(){ for(a println(element)) } } for more information: Click here.49) What is HashSet in Scala collection?HashSet is a sealed class. It extends AbstractSet and immutable Set trait. It uses hash code to store elements. It neither maintains insertion order nor sorts the elements.Exampleimport scala.collection.immutable.HashSet object MainObject{ def main(args:Array[String]){ var hashset = HashSet(4,2,8,0,6,3,45) hashset.foreach((element:Int) => println(element+" ")) } } For more information: Click here.50) What is BitSet in Scala?Bitsets are sets of non-negative integers which are represented as variable-size arrays of bits packed into 64-bit words. The largest number stored in it determines the memory footprint of a bitset. It extends Set trait.Exampleimport scala.collection.immutable._ object MainObject{ def main(args:Array[String]){ var numbers = BitSet(1,5,8,6,9,0) numbers.foreach((element:Int) => println(element)) } } For more information: Click here.51) What is ListSet in Scala collection?In Scala, ListSet class implements immutable sets using a list-based data structure. In ListSet class elements are stored internally in a reversed insertion order, which means the newest element is at the head of the list. This collection is suitable only for a small number of elements. It maintains insertion order.Exampleimport scala.collection.immutable._ object MainObject{ def main(args:Array[String]){ var listset = ListSet(4,2,8,0,6,3,45) listset.foreach((element:Int) => println(element+" ")) } } For more information: Click here.52) What is Seq in Scala collection?Seq is a trait which represents indexed sequences that are guaranteed immutable. You can access elements by using their indexes. It maintains insertion order of elements.Sequences support many methods to find occurrences of elements or subsequences. It returns a list.Exampleimport scala.collection.immutable._ object MainObject{ def main(args:Array[String]){ var seq:Seq[Int] = Seq(52,85,1,8,3,2,7) seq.foreach((element:Int) => print(element+" ")) println("\nAccessing element by using index") println(seq(2)) } } For more information: Click here.53) What is Vector in Scala collection?Vector is a general-purpose, immutable data structure. It provides random access of elements. It is suitable for a large collection of elements.It extends an abstract class AbstractSeq and IndexedSeq trait.Exampleimport scala.collection.immutable._ object MainObject{ def main(args:Array[String]){ var vector:Vector[Int] = Vector(5,8,3,6,9,4) //Or var vector2 = Vector(5,2,6,3) var vector3 = Vector.empty println(vector) println(vector2) println(vector3) } } For more information: Click here.54) What is List in Scala Collection?The List is used to store ordered elements. It extends LinearSeq trait. It is a class for immutable linked lists. This class is useful for last-in-first-out (LIFO), stack-like access patterns. It maintains order, can contain duplicates elements.Exampleimport scala.collection.immutable._ object MainObject{ def main(args:Array[String]){ var list = List(1,8,5,6,9,58,23,15,4) var list2:List[Int] = List(1,8,5,6,9,58,23,15,4) println(list) println(list2) } } For more information: Click here.55) What is the Queue in the Scala Collection?Queue implements a data structure that allows inserting and retrieving elements in a first-in-first-out (FIFO) manner.In Scala, Queue is implemented as a pair of lists. One is used to insert the elements and second to contain deleted elements. Elements are added to the first list and removed from the second list.Exampleimport scala.collection.immutable._ object MainObject{ def main(args:Array[String]){ var queue = Queue(1,5,6,2,3,9,5,2,5) var queue2:Queue[Int] = Queue(1,5,6,2,3,9,5,2,5) println(queue) println(queue2) } } For more information: Click here.56) What is a stream in Scala?The stream is a lazy list. It evaluates elements only when they are required. This is a feature of Scala. Scala supports lazy computation. It increases the performance of your program.Exampleobject MainObject{ def main(args:Array[String]){ val stream = 100 #:: 200 #:: 85 #:: Stream.empty println(stream) } } For more information: Click here.57) What does Map in Scala Collection?The map is used to store elements. It stores elements in pairs of key and values. In Scala, you can create a map by using two ways either by using comma separated pairs or by using rocket operator.Exampleobject MainObject{ def main(args:Array[String]){ var map = Map(("A","Apple"),("B","Ball")) var map2 = Map("A"->"Aple","B"->"Ball") var emptyMap:Map[String,String] = Map.empty[String,String] println(map) println(map2) println("Empty Map: "+emptyMap) } } For more information: Click here.58) What does ListMap in Scala?This class implements immutable maps by using a list-based data structure. You can create empty ListMap either by calling its constructor or using ListMap.empty method. It maintains insertion order and returns ListMap. This collection is suitable for small elements.Exampleimport scala.collection.immutable._ object MainObject{ def main(args:Array[String]){ var listMap = ListMap("Rice"->"100","Wheat"->"50","Gram"->"500") // Creating listmap with elements var emptyListMap = new ListMap() // Creating an empty list map var emptyListMap2 = ListMap.empty // Creating an empty list map println(listMap) println(emptyListMap) println(emptyListMap2) } } For more information: Click here.59) What is a tuple in Scala?A tuple is a collection of elements in the ordered form. If there is no element present, it is called an empty tuple. You can use a tuple to store any data. You can store similar type of mixing type data. You can return multiple values by using a tuple in function.Exampleobject MainObject{ def main(args:Array[String]){ var tuple = (1,5,8,6,4) // Tuple of integer values var tuple2 = ("Apple","Banana","Gavava") // Tuple of string values var tuple3 = (2.5,8.4,10.50) // Tuple of float values var tuple4 = (1,2.5,"India") // Tuple of mix type values println(tuple) println(tuple2) println(tuple3) println(tuple4) } } For more information: Click here.60) What is a singleton object in Scala?Singleton object is an object which is declared by using object keyword instead by class. No object is required to call methods declared inside a singleton object.In Scala, there is no static concept. So Scala creates a singleton object to provide an entry point for your program execution.Exampleobject Singleton{ def main(args:Array[String]){ SingletonObject.hello() // No need to create object. } } object SingletonObject{ def hello(){ println("Hello, This is Singleton Object") } } For more information: Click here.61) What is a companion object in Scala?In Scala, when you have a class with the same name as a singleton object, it is called a companion class and the singleton object is called a companion object. The companion class and its companion object both must be defined in the same source file.Exampleclass ComapanionClass{ def hello(){ println("Hello, this is Companion Class.") } } object CompanoinObject{ def main(args:Array[String]){ new ComapanionClass().hello() println("And this is Companion Object.") } } For more information: Click here.62) What are case classes in Scala?Scala case classes are just regular classes which are immutable by default and decomposable through pattern matching. It uses the equal method to compare instance structurally. It does not use the new keyword to instantiate the object.Examplecase class CaseClass(a:Int, b:Int) object MainObject{ def main(args:Array[String]){ var c = CaseClass(10,10) // Creating object of case class println("a = "+c.a) // Accessing elements of case class println("b = "+c.b) } } For more information: Click here.63) What is file handling in Scala?File handling is a mechanism for handling file operations. Scala provides predefined methods to deal with the file. You can create, open, write and read the file. Scala provides a complete package scala.io for file handling.Exampleimport scala.io.Source object MainObject{ def main(args:Array[String]){ val filename = "ScalaFile.txt" val fileSource = Source.fromFile(filename) for(line

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Published - Tue, 06 Dec 2022

Created by - Admin s

Control System Interview Questions and Answers

A list of top frequently asked Control System interview questions and answers are given below.1) What is meant by System?When the number of elements connected performs a specific function then the group of elements is said to constitute a system or interconnection of various components for a specific task is called system. Example: Automobile.2) What is meant by Control System?Any set of mechanical or electronic devices that manages, regulates or commands the behavior of the system using control loop is called the Control System. It can range from a small controlling device to a large industrial controlling device which is used for controlling processes or machines.more details..Play Videox3) What are the types of control system?There are two types of Control System-Open loop control system.Closed loop control system.4) What is open loop and control loop systems?Open loop control System: An open-loop control system is a system in which the control action is independent of the desired output signal. Examples: Automatic washing machine, Immersion rod.Closed loop control System: A closed-loop control system is a system in which control action is dependent on the desired output. Examples: Automatic electric iron, Servo voltage stabilizer, an air conditioner.more details..5) What is time-invariant System?The time required to change from one state to another state is known as transient time, the value of current and voltage during this period is called transient response and the system in which the input and output characteristics of the system does not change with time is called the Time-Invariant System.6) What are linear and non-linear systems?Linear system: Linear systems are the systems which possess the property of homogeneity and superposition. The term superposition means that an input r1(t) gives an output c1(t) and r2(t) will give the output c2(t). If we apply both the input r1(t) and r2(t) together, then the output will be the sum of c1(t) and c2(t).r1 (t) + r2 (t) = c1 (t) + c2 (t) Non-Linear System: Non-linear systems are the systems which do not possess the property of superposition and homogeneity, and the output of these systems are not directly proportional to its input. In these types of systems, the stability of the system depends upon the input and initial state of the system.more details..7) What is meant by analogous System?When the two differential equations are of same order or form such type of systems is called analogous systems.8) What is the Transfer Function?Transfer function of a system is defined as the ratio of Laplace transform of output to the Laplace transform of input with all the initial conditions as zero.Where,T(S) = Transfer function of system. C(S) = output. R(S) = Reference output. G(S) = Gain. more details..9) What are the advantages and disadvantages of open loop control System?Advantages of the open-loop control systemOpen loop systems are simple.These are economical.Less maintenance is required and is not difficult.Disadvantages of the open-loop control systemOpen loop systems are inaccurate.These systems are not reliable.These are slow.Optimization is not possible.10) What are the advantages and disadvantages of closed-loop control System?Advantages of closed-loop systemsThe closed loop systems are more reliable.Closed loop systems are faster.Many variables can be handled simultaneously.Optimization is possible.Disadvantages of closed-loop systemsClosed loop systems are expensive.Maintenance is difficult.Installation is difficult for these systems.11) What are the necessary components of the feedback control system?The processing system (open loop system), feedback path element, an error detector, and controller are the necessary components of the feedback control system.12) What is the feedback in the control system?When the input is fed to the system and the output received is sampled, and the proportional signal is then fed back to the input for automatic correction of the error for further processing to get the desired output is called as feedback in control system.13) What is Gain Margin?Gain margin is the gain which varies before the system becomes stable because if we continuously increase the gain up to a certain threshold, the system will become marginally stable, and if the gain varies further then it leads to instability. Mathematically, it is the reciprocal of the magnitude of the G(jω)H(jω) at phase cross-over frequency.14) What is Signal Flow Graph?The graphical representation of the system's relationship between the variables of a set of linear equations is called SFG (Signal Flow Graph). Signal flow graphs do not require any reduction technique or process.more details..15) What is Mason's Gain Formula?The input and output variable relationship of a signal flow graph is given by Mason's Gain Formula.For the determination of the overall system, the gain of the system is given by:Where,Pk = forward path gain of the Kth forward path.∆ = 1 - [Sum of the loop gain of all individual loops] + [Sum of gain products of all possible of two non-touching loops] + [Sum of gain products of all possible three non-touching loops] + .......∆k = The value of ∆ for the path of the graph is the part of the graph that is not touching the Kth forward path.more details..16) What are the essential characteristics of Signal Flow Graphs?The essential characteristics of the signal flow graph are:It represents a network in which nodes are used for the representation of system variable which is connected by direct branches.SFG is a diagram which represents a set of equations. It consists of nodes and branches such that each branch of SFG having an arrow which represents the flow of the signal.It is only applicable to the linear system.17) What is the basic rule for block diagram reduction technique?The basic rule for block diagram reduction is that if we make any changes in the diagram, then that changes do not create any changes in the input-output relationship of the system.more details..18) What is an order of a system?Order of the system is the highest derivative of the order of its equation. Similarly, it is the highest power of 's' in the denominator of the transfer function.19) What is the resonant peak?The maximum value of the closed-loop transfer function is called the Resonant Peak. A large value of resonant peak means that it has large overshoot value in the transient response.20) What is the cut-off rate?The slope of the log-magnitude curve near the cut-off frequency is called the cut-off rate. It indicates the ability of the system to differentiate between the signal and the noise.21) What is phase cross-over frequency?When the phase of the open loop transfer function reaches 180? at a particular frequency then it is called as Phase crossover frequency.22) What is Phase Margin?When we have to bring the system to the edge of instability, the additional phase lag required at the gain crossover frequency is called the Phase Margin.23) What Is Pole Of The System?The value at which the function F(s) becomes infinite is called the Pole of the function F(s), where F(s) is a function of complex variables.24) What Is Zero Of The System?The value at which the function F(s) becomes zero is called the Zero of the function F(s), where F(s) is a function of complex variables.25) What Is The Use For Cable Entry In Control Room?When there is an emergency, i.e., fire/explosion takes place in the plant, and we have to restrict it from entering to the control room then MCT (Multiple Cable Transient) blocks are used, and the process control rooms are built for the non-hazardous area.26) What is the effect of positive feedback on the Stability of the systems?Positive feedback increases the error signal and drives the system to the instability that is why it is not generally used in the control system. Positive feedbacks are used in minor loop control systems to amplify internal signals and parameters.27) What is Servomechanism?When a specific type of motor known as servomotor is combined with a rotary encoder or a potentiometer, to form a Servomechanism. In this setup, a potentiometer provides an analog signal to indicate the position and an encoder provide position and speed feedback.28) Where is Servomechanism used?Servomechanism is used in the control system so that the mechanical position of a device can be varied with the help of output.The Servomechanism is widely used in a Governor value position control mechanism that is used in power plants to take the speed of turbine and process it using the transducer, and the final value is taken as a mechanical movement of the value. However, nowadays Governor value position control is done with Electronic controls that use power Thyristors. This mechanism is also used in robotic hand movement.29) How many types of instrument cables are there?The following types of instrument cables are there:IS cablesNIS cables.IS - Intrinsic safety and NIS - Non Intrinsic safety.Depending upon the condition of hazards the type of cable is decided.30) What are the temperature elements?The temperature elements are-Thermocouple.Resistance temperature detectors (RTDs).31) What is Cable Tray, its Type, and its Support?The media or way through which we lay the field cables in plants is called as cable tray. These are made of aluminum, steel or fiber reinforced plastic (FRP) and are available in six types-Ladder type Cable Tray(made of Rungs type construction)Solid Bottom Cable TrayTrough Cable TrayChannel Cable TrayWire Mesh Cable TraySingle Rail Cable TrayThe main points which we have to consider before laying the cables are the site conditions and the adequate space where we have to lay the cable.32) How to decide cable tray size?Based on the occupancy in the cable tray and a number of cables required we have to choose the size of the cable tray. These are available in all sizes like 80,150, 300, 450, 600 and 900.33) What is the cut-off Rate?The slope near the cut-off frequency of the log-magnitude curve is called the cut-off rate. The cut-off rate indicates the ability of the system to distinguish between the signal and the noise.34) Enlists the applications of Sampled Data Systems?Sampled data system has the following applications-Quantized data is used for controlling in High-speed tinplate rolling mills.Digitally controlled or pulse controlled electric drives.For machine tool operations which are numerically controlled.It is used in large systems using telemetry links based on pulse modulation (PM) translational data.35) What are DCS and PLC?DCS and PLC are the control systems which handles fields I/Os. DCS is Distributed control system, and PLC is the Programmable logic controller.36) What are stable systems?Stable systems are the system in which all the roots of the characteristic equations lie on the right half of the 'S' plane.37) What are marginally stable systems?Marginally stable systems are the system in which all the roots of the characteristic equations lie on the imaginary axis of the 'S' plane38) What are unstable systems?Unstable systems are the system in which all the roots of the characteristic equations lie on the left half of the 'S' plane.39) What is Routh Hurwitz Stability Criterion?Routh Hurwitz criterion states that a system is stable if and only if all the roots of the first column have the same sign and if all the signs are not same then number of time the sign changes in the first column is equal to the number of roots of the characteristic equation in the right half of the s-plane.more details..40) What is an Automatic Controller?Automatic Controllers are the device which compares the actual value of plant output with the desired value. These systems produce the control system that reduces the deviation to ?0? or to a small value and determines the deviation.41) What is the Control Action?Control action is the manner in which the automatic controller produces the control signal.

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Electrical Machines Interview questions and Answers

A list of top frequently asked Digital Electronics Interview Questions and answers are given below.1) What is the difference between Latch And Flip-flop?The difference between latches and Flip-flop is that the latches are level triggered and flip-flops are edge triggered. In latches level triggered means that the output of the latches changes as we change the input and edge triggered means that control signal only changes its state when goes from low to high or high to low.Latches are fast whereas flip-flop is slow.2) What is the binary number system?The system which has a base 2 is known as the binary system and it consists of only two digits 0 and 1.Play VideoxFor Example: Take decimal number 625625 = 600 + 20 + 5That means,6×100 + 2×10 + 56 ×102 + 2×101 + 5×100In this 625 consist of three bits, we start writing the numbers from the rightmost bit power as 0 then the second bit as power 1 and the last as power 2. So, we can represent a decimal number as∑digit × 10corresponding position or bitHere 10 is the total number of digits from 0 to 9.3) State the De Morgan's Theorem?De Morgan's Theorem stated two theorems:1.The complement of a product of two numbers is the sum of the complements of those numbers.(A. B)' = A' + B'Truth Table:2. The complement of the sum of two numbers is equal to the product of the complement of two numbers.(A + B)' = A'B'Truth Table:4) Define Digital System?Digital systems are the system that processes a discrete or digital signal.5) What is meant by a bit?Bits are the binary digits like 0 and 1.6) What is the best Example of Digital system?Digital Computer.7) How many types of number system are there?There are four types of number system:Decimal Number System.Binary Number System.Octal Number System.Hexadecimal Number System.8) What is a Logic gate?The basic gates that make up the digital system are called a logic gate. The circuit that can operate on many binary inputs to perform a particular logic function is called an electronic circuit.9) What are the basic Logic gates?There are three basic logic gates-AND gate.OR gate.NOT gate.10) Which gates are called as Universal gate and what are its advantages?The Universal gates are NAND and NOR. The advantages of these gates are that they can be used for any logic calculation.11) What are the applications of the octal number system?The applications of the octal number system are as follows:For the efficient use of microprocessors.For the efficient use of digital circuits.It is used to enter binary data and display of information.12) What are the fundamental properties of Boolean algebra?The basic properties of Boolean algebra are:Commutative Property.Associative Property.Distributive Property.13) What are Boolean algebra and Boolean expression?14) What is meant by K-Map or Karnaugh Map?K-Map is a pictorial representation of truth table in which the map is made up of cells, and each term in this represents the min term or max term of the function. By this method, we can directly minimize the Boolean function without following various steps.15) Name the two forms of Boolean expression?The two forms of Boolean expression are:Sum of products (SOP) form.The Product of sum (POS) form.16) What are Minterm and Maxterm?A minterm is called Product of sum because they are the logical AND of the set of variables and Maxterm are called sum of product because they are the logical OR of the set of variables.17) Write down the Characteristics of Digital ICs?The characteristics of digital ICs are -Propagation delay.Power Dissipation.Fan-in.Fan-out.Noise Margin.18) What are the limitations of the Karnaugh Map?The limitations of Karnaugh Map are as follows:It is limited to six variable maps which means more than six variable involving expressions are not reduced.These are useful for only simplifying Boolean expression which is represented I standard form.19) What are the advantages and disadvantages of the K-Map Method?The advantages of the K-Map method are as follows-It is an excellent method for simplifying expression up to four variables.For the logical simplification, it gives us a visual method.It is suitable for both SOP and POS forms of reduction.It is more suitable for classroom teachings on logic simplification.The disadvantages of the K-Map method are as follows:It is not suitable when the number of variables exceeds more than four.For Computer reduction, it is not suitable.We have to take while entering the numbers in the cell-like 0, 1 and don't care terms.20) What are the advantages and disadvantages of Quine-MC Cluskey method?21) Define Pair, Quad, and Octet?Pair: Two adjacent cell of karnaugh map is called as Pair. It cancels one variable in a K-Map simplification.Quad: A Pair of Four adjacent pairs in a karnaugh map is called a quad. It cancels two variables in a K-Map simplification.Octet: A Pair of eight adjacent pair in a karnaugh map is called an octet. It cancels four variables in a K-map simplification.22) Define Fan-in and Fan-out?Fan-in- The Fan-in of the gate means that the number of inputs that are connected to the gate without the degradation of the voltage level of the system.Fan-out- The Fan-out is the maximum number of same inputs of the same IC family that a gate can drive maintaining its output levels within the specified limits.23) Write the definition of the Duality Theorem?Duality Theorem states that we can derive another Boolean expression with the existing Boolean expression by:Changing OR operation (+ Sign) to AND operation (. Dot Sign) and vice versa.Complimenting 0 and 1 in the expression by changing 0 to 1 and 1 to 0 respectively.24) What is Half-Adder?Half-adder is the circuits that perform the addition of two bits. It has two inputs A and B and two outputs S (sum) and C (carry). It is represented by XOR logic gate and an AND logic gate.Truth Table of Half adder:25) What is Full-Adder?Full-adder is the circuits that perform the addition of three bits. It has three inputs A, B and a carry bit. Full adders are represented with AND, OR and XOR logic gate.Truth Table of Full-Adder26) What is power dissipation?Period time is the electrical energy used by the logic circuits. It is expressed in milliwatts or nanowatts.Power dissipation = Supply voltage * mean current taken from the supply.27) What is a Multiplexer?The multiplexer is a digital switch which combines all the digital information from several sources and gives one output.28) What are the applications of Multiplexer (MUX)?The applications of the multiplexer are as follows:It is used as a data selector from many inputs to get one output.It is used as A/D to D/A Converter.These are used in the data acquisition system.These are used in time multiplexing system.29) What is a Demultiplexer?The demultiplexer is a circuit that receives the input on a single line and transmits this onto 2n possible output line. A Demultiplexer of 2n outputs has n select lines, which are used to select which output line is to be sent to the input. The demultiplexer is also called as Data Distributor.30) What are the applications of Demultiplexer?The applications of the demultiplexer are as follows:It is used in the data transmission system with error detection.It is used as a decoder for the conversion of binary to decimal.It is used as a serial to parallel converter.31) What are the differences between Combinational Circuits and Sequential Circuits?The differences between combinational and sequential circuits are as follows:S.NoCombinational CircuitsSequential Circuits1.These are faster in speed.These are slower.2.These are easy to design.These are difficult to design.3.The clock input is not required.The clock input is required.4.In this, the memory units are not required.In this, the memory units are required to store the previous values of inputs.5.Example: Mux, Demux, encoder, decoder, adders, subtractors.Example: Shift registers, counters.32) Define Rise Time?Rise time is the time that is required to change the voltage level from 10% to 90%.33) Define fall time?Fall time is the time that is required to change the voltage level from 90% to 10%.34) Define Setup time?The minimum time that is required to maintain the constant voltage levels at the excitation inputs of the flip-flop device before the triggering edge of the clock pulse for the levels to be reliably clocked in the flip flop is called the Setup time. It is denoted as tsetup.35) Define Hold time?The minimum time at which the voltage level becomes constant after triggering the clock pulse in order to reliably clock into the flip flop is called the Hold time. It is denoted by thold.36) What is the difference between Synchronous and Asynchronous Counters?The difference between Synchronous and Asynchronous Counters are as follows:S.NoAsynchronous CountersSynchronous Counters1.These are low-speed Counters.These are high-speed Counters.2.The Flip flops of these counters are not clocked simultaneously.In these counters, the flip-flops are clocked simultaneously.3.Simple logic circuits are there for more number of states.Complex logic circuits are there when the number of states increases.37) What are the applications of Flip-Flops?The applications of flip-flops are:Flip-flops are used as the delay element.These are used for Data transfer.Flip-flops are used in Frequency Division and Counting.Flip-Flops are used as the memory element.38) What is the difference between D-latch and D Flip-flop?D-latch is level sensitive whereas flip-flop is edge sensitive. Flip-flops are made up of latches.39) What are the applications of Buffer?Applications of buffer are as follows:Buffer helps to introduce small delays.Buffer helps for high Fan-out.Buffer are used to eliminate cross talks.

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Published - Tue, 06 Dec 2022

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Digital Electronics Interview Questions

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Robotics Interview questions and Answers

Robotics Interview questionsA list of top frequently asked Robotics Interview Questions and answers are given below.1) What do you understand by the term, the robotics?The robotics is a combined branch of engineering and science which deals with the study of development, operation, and control of intelligent robots. The robotics is a part of Artificial intelligence.The robotics technology is used for the development of machines which can perform a complex human task in a very efficient way.2) What is a robot?A robot is a programmable machine which is capable of doing complex tasks automatically with precision and efficiency. The robots can be guided by external or internal input to perform any work.Play VideoA robot can be designed as resembled as human or it can be designed as a standard machine look alike.3) Which was the first industrial robot?The first industrial robot was "Unimate." It was manufactured by American inventor George Devol in 1950 and used in 1954. It was produced for the transportation of die casting form an assembly line and then welding on auto bodies.4) What are the Laws of the robotics?The "Three Laws of the robotics" also known as "Asimov's law," given by the author Isaac Asimov. The three laws are given below:First law: A the robot may not injure a human being or, through inaction, allow a human being to come to harm.Second law: A the robot must obey the orders given it by human beings except where such orders would conflict with the First Law.Third law: A the robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.After that Asimov also added one more law which precedes the other laws:Zeroth law: A the robot may not harm humanity, or, by inaction, allow humanity to come to harm.5) List the name of the areas where the robotics can be applied?Now a day's the robotics can be applied to most of the areas to provide efficient work with the highest precision and in less time. So there is an overview of areas where robots can be applied in day to day life as well.Military AreaIndustrial AreaAgriculture IndustriesDomestic AreasMedical AreasResearches6) What do you understand by "humanoid robot"?A robot which looks like overall as a Human body is known as a Humanoid robot. A Humanoid robot can have human facial expressions with the features. There are two types of the Humanoid robot to resemble as male and female:Android Humanoid: They are built to resemble a male bodyGynoids Humanoid: They are made to resemble a female body.A humanoid robot is entirely an automatic robot which can interact with the Humans and also can react according to the surrounding.Sophia is a first humanoid which has also got citizenship from the country of Saudi Arabia.7) What are the basic aspects of the robotics?The basic aspects of the robotics to create a robot are given below:Electrical/electronic components- The robotics required electrical and electronic components as power supply, sensors, and microcontroller and motors circuits.Mechanical equipment- The robotics required mechanical equipment for giving shape or designing the body of a robotComputer programs- The robotics also includes computer programs to provide the instructions to the robot as what type of task, when it should be done, how it should be done, etc. Robo ML, ROBOFORTH, XRCL, and visual programming are the programming languages which are used in the robotics.8) What are the components of a robot?There are the basic components of a robot which are given below:Power supply- Power supply is the main components for the run of any device or machine. So a robot also takes energy from the power supply to perform a task. It can be provided from the batteries, hydraulic, solar power or pneumatic power sources.Actuators- Actuators are the devices which convert energy into movement.Electric motors (DC/AC) - Motors are used to convert electrical energy into mechanical energy. Most of the robots used these motors to provide various type of movements to their parts. Brushless and brushed DC motors used in portable the robots and AC motors used in industrial the robots.Sensors- Sensors are used to sense the changes in surrounding and produce a signal. Hence the robots are also equipped with the various types of sensors to detect the environment and responded accordingly.Controller- Controller is the brain of a robot, which controls and co-ordinate with all parts of the robot. And with the help of the controller, the robot can perform all the assigned task. A Microprocessor is a core part of the controller, which takes various signals as Input and generate a corresponding output signal.9) Why do we use robots in the industry?There are the following reasons to use the robots in industry:The robots are used in industry as the robots can perform a task with the highest precision and efficiency.The robots can be operated 24/7 for continues production.The robots can perform some dangerous tasks in the industry.The robots are cost-effective concerning the industry.10) What is AI? Why do we implement AI in the robots?Artificial intelligence is a technology which can develop intelligent devices that can react and work as a human being. AI includes:Speech recognitionLearningProblem-solvingPlanningImplementation of AI in the robots makes a robot intelligent which can perform a complex task, and it can sense the environment and react accordingly.11) What are various types of sensors used in the robotics?There are the following sensors which can be used in the robotics:Light sensors- A light sensor detect light and create a voltage difference, which is equivalent to the light intensity fall on the sensor.The two main Light sensors which used in the robotics are:Photovoltaic cellsPhoto-resistor sensorSound sensors- This sensors are microphones which detects sound and return a voltage difference equivalents to the level of sound. Example of a sound sensor is: Instruct a robot by clap.Temperature sensor- Temperature sensors sense the change in temperature of the surrounding. It provides a voltage difference equivalent to a change in temperature occurred.Example of temperature sensor IC's are LM34, LM35, TMP35, TMP36, and TMP37.Proximity sensor- Proximity sensor can sense any nearby object without any physical contact. Following are the type of proximity sensor used in the robotics:Infrared (IR) Transceivers,Ultrasonic SensorPhoto-resistor sensorAcceleration Sensor- Accelerometer is a device which detects the acceleration and can tilt accordingly.Navigation sensor- These are the sensors which are used to identify the position of the robot. Some of the navigation sensors are:GPS (global positioning system)Digital Magnetic compassLocalization12) What is a robot Locomotion?The robot locomotion is a group of methods which a robot used to transport itself from one place to another place. There are various types of robot locomotion, which are given below:-WalkingRunningRollingHoppingSwimmingSlitheringHybrid13) What is Autonomous robot?A type of robot which can perform any task with autonomy is called an Autonomous robot. An autonomous robot can do work with its own decision without human interaction.14) What is, "human-robot interaction"?Human-robot interaction is a field of study which defines an interaction or communication between a robot and Human. The "Three Laws of The robotics" are given on HRI, which defines a safe interaction between a human and a robot.15) How to send information from the robot sensors to the robot controllers?We can send any information from the robot sensor to the robot controller through the signal.16) What is the Pneumatic System in The robotics?A Pneumatic system is used to drive a machine by using compressed gases. In the robotics, servo motors and electric motors can be replaced by a pneumatic system.A pneumatic system consists of a cylinder piston which can move up and down direction to create pressure.17) Name the basic unit of a robot which can be programmed to give instructions to the robot?The controller is the basic unit of a robot which can be programmed and it can give all type of instructions to perform any tasks.18) What is the degree of freedom in the robotics? How can it be determined?The Degree of freedom in the robotics defines the freedom of movement of the mechanical parts of a robot. It defines the modes by which a machine can move.The Degree of Freedom can be determined as the number of movable joints in the base, the arm, and the end effectors of the robot.19) What is PROLOG used in Artificial intelligence?PROLOG is an acronym for Programming logic.PROLOG is a high-level programming language used primarily in Artificial intelligence, and It consists of the list of rules and factPROLOG is called a declarative programming language20) What is LISP?LISP stands for List programmingLISP mainly used for Artificial intelligence because it can process symbolic information with efficiency.21) What are the axes of movement of the robot?Wrist rotationX-Y coordinate motionElbow rotation22) What do you understand by numerical control?Numerical control is a process of controlling the machine with the help of a computer or sets of instructions.With the help of numerical control, we can automate the machines.23) What is Servo controlled robot?A servo controlled robot is one which works on the servo mechanism. Servo controlled robots are consist of servo motors which processed by the signals. A servo controlled robot can accelerate, that means these robots can change their speed at a different point.24) Name of the industry which highly used the robots?The Automobile industry is an industry which highly used robots for production.25) What are actuators in the robotics?Actuators are the electromechanical device which converts the electric energy into mechanical energy. Actuators can generate motion in each part of the robot.26) What types of motors used in industrial robots?There are various types of motors available, but we can choose a motor for the robotics as per the use of an area. The motor used will depend on how and where a robot is to be used. But there are some common motors which can be used in industrial robotics:Servo MotorsDC/AC motorsStepper MotorsBelt drive motorArm adapted motors.27) What is continuous-path control in the robotics?When we program a robot for physically move through the trajectory or an irregular path exactly then such type of control is called as Continuous-path control in robotics.28) If we wanted to add two number a and b, then how it can be written in LISP language?If we wanted to add two numbers a and b, then it can be written as (+a b) in LISP language.29) What is the use of the function (copy-list ) in LISP?This function is used to return the copy of the defined list.30) What is the Future of The robotics?There are the following areas where the robotics can be used vastly in futureThe robotics can be used for e-commerceThe robotics can be raised with cloud-based software which will define new skills in the robotsThe robotics can be used more than the industries.The robotics can be used in the medical field31) What are industrial robots? Explain the various types of Industrial robots?Industrial robots are those robots which mainly work for manufacturing and production in industries.There are various types of robots which are being used in multiple areas depending on their work, and the following are the description of some industrial robots:Cartesian: Cartesian robot applies the Cartesian coordinate system(X, Y, and Z). These type of the robots have three linear joints. They also may have a wrist which can provide a rotational movement.Polar: The Polar robot is a type of robot which can consist of a rotatory base with an elevation pivot. The polar robot has only one arm which can perform the various task.SCARA: SCARA stands for "Selective Compliance Assembly Robot Arm." Sacra robot can do three linear movements with a vertical motion. It is fixed at the Z axis and flexible in XY axes.Delta: These robots are the shape of a spider which has parallel arms connected to the universal joints.Cylindrical: Cylindrical robot has a rotatory joint for the rotational transaction and a prismatic joint for performing a linear movement.Articulated: Articulated robots have rotatory joints which can range from simple two joints structure to a complex structure with 10 or more joints.32) What is a microcontroller? What is the use of the microcontroller in the robotics?A Microcontroller is a small programmable integrated chip which is used in the embedded system. It consists of a processor, memory with I/O peripherals.In robotics, the microcontroller is used as "brain" for the robot. It controls all the actions performed by the robot. It also gives instructions to a robot to perform any task.

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Published - Tue, 06 Dec 2022

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TypeScript Interview Questions and answers

A list of top frequently asked TypeScript Interview Questions and answers are given below.1) What is Typescript?TypeScript is a free and open-source programming language developed and maintained by Microsoft. It is a strongly typed superset of JavaScript that compiles to plain JavaScript. It is a language for application-scale JavaScript development. TypeScript is quite easy to learn and use for developers familiar with C#, Java and all strong typed languages.TypeScript can be executed on Any browser, Any Host, and Any Operating System. TypeScript is not directly run on the browser. It needs a compiler to compile and generate in JavaScript file. TypeScript is the ES6 version of JavaScript with some additional features.2) How is TypeScript different from JavaScript?TypeScript is different from JavaScript in the following manner:Play VideoxSNJavaScriptTypeScript1It was developed by Netscape in 1995.It was developed by Anders Hejlsberg in 2012.2JavaScript source file is in ".js" extension.TypeScript source file is in ".ts" extension.3JavaScript doesn't support ES6.TypeScript supports ES6.4It doesn't support strongly typed or static typing.It supports strongly typed or static typing feature.5It is just a scripting language.It supports object-oriented programming concept like classes, interfaces, inheritance, generics, etc.6JavaScript has no optional parameter feature.TypeScript has optional parameter feature.7It is interpreted language that's why it highlighted the errors at runtime.It compiles the code and highlighted errors during the development time.8JavaScript doesn't support modules.TypeScript gives support for modules.9In this, number, string are the objects.In this, number, string are the interface.10JavaScript doesn't support generics.TypeScript supports generics.To know more click here.3) Why do we need TypeScript?We need TypeScript:TypeScript is fast, simple, and most importantly, easy to learn.TypeScript supports object-oriented programming features such as classes, interfaces, inheritance, generics, etc.TypeScript provides the error-checking feature at compilation time. It will compile the code, and if any error found, then it highlighted the errors before the script is run.TypeScript supports all JavaScript libraries because it is the superset of JavaScript.TypeScript support reusability by using the inheritance.TypeScript make app development quick and easy as possible, and the tooling support of TypeScript gives us autocompletion, type checking, and source documentation.TypeScript supports the latest JavaScript features including ECMAScript 2015.TypeScript gives all the benefits of ES6 plus more productivity.TypeScript supports Static typing, Strongly type, Modules, Optional Parameters, etc.4) List some features of Typescript?To know more click here.5) List some benefits of using Typescript?TypeScript has the following benefits.It provides the benefits of optional static typing. Here, Typescript provides types that can be added to variables, functions, properties, etc.Typescript has the ability to compile down to a version of JavaScript that runs on all browsers.TypeScript always highlights errors at compilation time during the time of development whereas JavaScript points out errors at the runtime.TypeScript supports strongly typed or static typing whereas this is not in JavaScript.It helps in code structuring.It uses class-based object-oriented programming.It provides excellent tooling supports with IntelliSense which provides active hints as the code is added.It has a namespace concept by defining a module.6) What are the disadvantages of TypeScript?TypeScript has the following disadvantages:TypeScript takes a long time to compile the code.TypeScript does not support abstract classes.If we run the TypeScript application in the browser, a compilation step is required to transform TypeScript into JavaScript.Web developers are using JavaScript from decades and TypeScript doesn?t bring anything new.To use any third party library, the definition file is must. And not all the third party library have definition file available.Quality of type definition files is a concern as for how can you be sure the definitions are correct?7) What are the different components of TypeScript?The TypeScript has mainly three components. These are-LanguageThe language comprises elements like new syntax, keywords, type annotations, and allows us to write TypeScript.CompilerThe TypeScript compiler is open source, cross-platform, and is written in TypeScript. It transforms the code written in TypeScript equivalent to its JavaScript code. It performs the parsing, type checking of our TypeScript code to JavaScript code. It can also help in concatenating different files to the single output file and in generating source maps.Language ServiceThe language service provides information which helps editors and other tools to give better assistance features such as automated refactoring and IntelliSense.To know more click here.8) Who developed Typescript and what is the current stable version of Typescript?The typescript was developed by Anders Hejlsberg, who is also one of the core members of the development team of C# language. The typescript was first released in the month of October 1st, 2012 and was labeled version 0.8. It is developed and maintained by Microsoft under the Apache 2 license. It was designed for the development of a large application.The current stable version of TypeScript is 3.2 which was released on September 30, 2018. Typescript compiles to simple JavaScript code which runs on any browser that supports ECMAScript 2015 framework. It offers support for the latest and evolving JavaScript features.9) Tell the minimum requirements for installing Typescript. OR how can we get TypeScript and install it?TypeScript can be installed and managed with the help of node via npm (the Node.js package manager). To install TypeScript, first ensure that the npm is installed correctly, then run the following command which installs TypeScript globally on the system.$ npm install -g typescript It installs a command line code "tsc" which will further be used to compile our Typescript code. Make sure that we check the version of Typescript installed on the system.Following steps are involved for installing TypeScript:Download and run the .msi installer for the node.Enter the command "node -v" to check if the installation was successful.Type the following command in the terminal window to install Typescript: $ npm install -g typescriptTo know installation process click here.10) List the built-in types in Typescript.The built-in data types are also known as primitive data types in Typescript. These are given below.Number type: It is used to represent number type values. All the numbers in TypeScript are stored as floating point values.Syntax: let identifier: number = value;String type: It represents a sequence of characters stored as Unicode UTF-16 code. We include string literals in our scripts by enclosing them in single or double quotation marks.Syntax: let identifier: string = " ";Boolean type: It is used to represent a logical value. When we use the Boolean type, we get output only in true or false. A Boolean value is a truth value that specifies whether the condition is true or not.Syntax: let identifier: bool = Boolean value;Null type: Null represents a variable whose value is undefined. It is not possible to directly reference the null type value itself. Null type is not useful because we can only assign a null value to it.Syntax: let num: number = null;Undefined type: It is the type of undefined literal. The Undefined type denotes all uninitialized variables. It is not useful because we can only assign an undefined value to it. This type of built-in type is the sub-type of all the types.Syntax: let num: number = undefined;Void type: A void is the return type of the functions that do not return any type of value. It is used where no datatype is available.Syntax: let unusable: void = undefined;To know TypeScript datatypes in detail click here.11) What are the variables in Typescript? How to create a variable in Typescript?A variable is the storage location, which is used to store value/information to be referenced and used by programs. It acts as a container for value in a program. It can be declared using the var keyword. It should be declared before the use. While declaring a variable in Typescript, certain rules should be followed-The variable name must be an alphabet or numeric digits.The variable name cannot start with digits.The variable name cannot contain spaces and special character, except the underscore(_) and the dollar($) sign.We can declare a variable in one of the four ways:Declare type and value in a single statement. Syntax: var [identifier] : [type-annotation] = value;Declare type without value. Syntax: var [identifier] : [type-annotation];Declare its value without type. Syntax: var [identifier] = value;Declare without value and type. Syntax: var [identifier];To know more in detail click here.https://www.javatpoint.com/typescript-variables12) How to compile a Typescript file?Here is the command which is followed while compiling a Typescript file into JavaScript.$ tsc For example, to compile "Helloworld.ts."$ tsc helloworld.ts The result would be helloworld.js.13) Is it possible to combine multiple .ts files into a single .js file? If yes, then how?Yes, it is possible. For this, we need to add --outFILE [OutputJSFileName] compiling option.$ tsc --outFile comman.js file1.ts file2.ts file3.ts The above command will compile all three ".ts"file and result will be stored into single "comman.js" file. In the case, when we don't provide an output file name as like in below command.$ tsc --outFile file1.ts file2.ts file3.ts Then, the file2.ts and file3.ts will be compiled, and the output will be placed in file1.ts. So now our file1.ts contains JavaScript code.14) Is it possible to compile .ts automatically with real-time changes in the .ts file?Yes, it is possible to compile ".ts" automatically with real-time changes in the .ts file. This can be achieved by using --watch compiler optiontsc --watch file1.ts The above command first compiles file1.ts in file1.js and watch for the file changes. If there is any change detected, it will compile the file again. Here, we need to ensure that command prompt must not be closed on running with --watch option.15) What do you mean by interfaces? Explain them with reference to Typescript.An Interface is a structure which acts as a contract in our application. It defines the syntax for classes to follow, it means a class that implements an interface is bound to implement all its members. It cannot be instantiated but can be referenced by the class object that implements it. The TypeScript compiler uses interface for type-checking (also known as "duck typing" or "structural subtyping") whether the object has a specific structure or not.Syntax:interface interface_name { // variables' declaration // methods' declaration } The interface just declares the methods and fields. It cannot be used to build anything. Interfaces need not be converted to JavaScript for execution. They have zero runtime JavaScript impact. Thus, their only purpose is to help in the development stage.16) What do you understand by classes in Typescript? List some features of classes.We know, TypeScript is a type of Object-Oriented JavaScript language and supports OOPs programming features like classes, interfaces, etc. Like Java, classes are the fundamental entities which are used to create reusable components. It is a group of objects which have common properties. A class is a template or blueprint for creating objects. It is a logical entity. The "class" keyword is used to declare a class in Typescript.Example:class Student { studCode: number; studName: string; constructor(code: number, name: string) { this.studName = name; this.studCode = code; } getGrade() : string { return "A+" ; } } Features of a class are-InheritanceEncapsulationPolymorphismAbstraction17) Is Native Javascript supports modules?No. Currently, modules are not supported by Native JavaScript. To create and work with modules in Javascript we require an external like CommonJS.18) Which object oriented terms are supported by TypeScript?TypeScript supports following object oriented terms.ModulesClassesInterfacesInheritanceData TypesMember functions19) How to Call Base Class Constructor from Child Class in TypeScript?super() function is used to called parent or base class constructor from Child Class.20) How do you implement inheritance in TypeScript?Inheritance is a mechanism that acquires the properties and behaviors of a class from another class. It is an important aspect of OOPs languages and has the ability which creates new classes from an existing class. The class whose members are inherited is called the base class, and the class that inherits those members is called the derived class.An Inheritance can be implemented by using the extend keyword. We can understand it by the following example.class Shape { Area:number constructor(area:number) { this.Area = area } } class Circle extends Shape { display():void { console.log("Area of the circle: "+this.Area) } } var obj = new Circle(320); obj.display() //Output: Area of the circle: 320 To know more click here.21) What are the Modules in Typescript?A module is a powerful way to create a group of related variables, functions, classes, and interfaces, etc. It can be executed within their own scope, not in the global scope. In other words, the variables, functions, classes, and interfaces declared in a module cannot be accessible outside the module directly.Creating a ModuleA module can be created by using the export keyword and can be used in other modules by using the import keyword.module module_name{ class xyz{ export sum(x, y){ return x+y; } } } To know more click here.22) What is the difference between the internal module and the external module?The difference between internal and external module is given below:SNInternal ModuleExternal Module1Internal modules were used to logically group the classes, interfaces, functions, variables into a single unit and can be exported in another module.External modules are useful in hiding the internal statements of the module definitions and show only the methods and parameters associated with the declared variable.2Internal modules were in the earlier version of Typescript. But they are still supported by using namespace in the latest version of TypeScript.External modules are simply known as a module in the latest version of TypeScript.3Internal modules are local or exported members of other modules (including the global module and external modules).External modules are separately loaded bodies of code referenced using external module names.4Internal modules are declared using ModuleDeclarations that specify their name and body.An external module is written as a separate source file that contains at least one import or export declaration.5Example:module Sum { export function add(a, b) { console.log("Sum: " +(a+b)); } } Example:export class Addition{ constructor(private x?: number, private y?: number){ } Sum(){ console.log("SUM: " +(this.x + this.y)); } }To know more in detail click here.23) What is namespace in Typescript? How to declare a namespace in Typescript?A namespace is a way that is used for logical grouping of functionalities. Namespaces are used to maintain the legacy code of typescript internally. It encapsulates the features and objects that share certain relationships. A namespace is also known as internal modules. A namespace can also include interfaces, classes, functions, and variables to support a group of related functionalities.Note: A namespace can be defined in multiple files and allow to keep each file as they were all defined in one place. It makes code easier to maintain.Synatax for creating namespacenamespace { export interface I1 { } export class c1{ } } To know more click here.24) Explain Decorators in Typescript?A Decorator is a special kind of declaration that can be applied to classes, methods, accessor, property, or parameter. Decorators are simply functions that are prefixed @expression symbol, where expression must evaluate to a function that will be called at runtime with information about the decorated declaration.TypeScript Decorators serves the purpose of adding both annotations and metadata to the existing code in a declarative way. Decorators are an experimental feature proposed for ES7. It is already in use by some of the JavaScript frameworks including Angular 2. The Decorators may change in future releases.To enable experimental support for decorators, we must enable the experimentalDecorators compiler option either on the command line or in our tsconfig.json:Command Line$tsc --target ES5 --experimentalDecorators tsconfig.json{ "compilerOptions": { "target": "ES5", "experimentalDecorators": true } } To know more click here.25) What are Mixins?In Javascript, Mixins are a way of building up classes from reusable components is to build them by combining simpler partial classes called mixins.The idea is simple, instead of a class A extending class B to get its functionality, function B takes class A and returns a new class with this added functionality. Function B is a mixin.26) What is default visibility for properties/methods in TypeScript classes?Public is the default visibility for properties/methods in TypeScript classes.27) How does TypeScript support optional parameters in function as in JavaScript every parameter is optional for a function?Unlike JavaScript, the TypeScript compiler will throw an error if we try to invoke a function without providing the exact number and types of parameters as declared in its function signature. To overcome this problem, we can use optional parameters by using question mark sign ('?'). It means that the parameters which may or may not receive a value can be appended with a '?' to mark them optional.function Demo(arg1: number, arg2? :number) { }So, arg1 is always required, and arg2 is an optional parameter. So, arg1 is always required, and arg2 is an optional parameter.Note: Optional parameters must follow the required parameters. If we want to make arg1 optional, instead of arg2, then we need to change the order and arg1 must be put after arg2.function Demo(arg2: number, arg1? :number) { } To know more click here.28) Does TypeScript supports function overloading as JavaScript doesn't support function overloading?Yes, TypeScript support function overloading. But the implementation is odd. When we perform function overloading in TypeScript, then we can implement only one functions with multiple signatures.//Function with string type parameter function add(a:string, b:string): string; //Function with number type parameter function add(a:number, b:number): number; //Function Definition function add(a: any, b:any): any { return a + b; } In the above example, the first two lines are the function overload declaration. It has two overloads. The first signature has a parameter of type string whereas the second signature has a parameter of type number. The third function contains the actual implementation and has a parameter of type any. Any data type can take any type of data. The implementation then checks for the type of the supplied parameter and execute a different piece of code based on supplier parameter type.29) Is it possible to debug any TypeScript file?Yes, it is possible. To debug any TypeScript file, we need .js source map file. So compile the .ts file with the --sourcemap flag to generate a source map file.$ tsc -sourcemap file1.ts This will create file1.js and file1.js.map. And last line of file1.js would be reference of source map file.//# sourceMappingURL=file1.js.map 30) What is TypeScript Definition Manager and why do we need it?TypeScript Definition Manager (TSD) is a package manager used to search and install TypeScript definition files directly from the community-driven DefinitelyTyped repository.Suppose, we want to use some jQuery code in our .ts file.$(document).ready(function() { //Your jQuery code }); Now, when we try to compile it by using tsc, it will give a compile-time error: Cannot find the name "$". So, we need to inform TypeScript compiler that "$" is belongs to jQuery. To do this, TSD comes into play. We can download jQuery Type Definition file and include it in our .ts file. Below are the steps to perform this:First, install TSD.$ npm install tsd -g In TypeScript directory, create a new TypeScript project by running:$ tsd init Then install the definition file for jQuery.tsd query jquery --action install The above command will download and create a new directory containing jQuery definition file ends with ".d.ts". Now, include definition file by updating TypeScript file to point to the jQuery definition./// $(document).ready(function() { //To Do }); Now, compile again. This time js file will be generated without any error. Hence, the need of TSD helps us to get type definition file for the required framework.31) What is TypeScript Declare Keyword?We know that all JavaScript libraries/frameworks don't have TypeScript declaration files, but we want to use them in our TypeScript file without any compilation errors. To do this, we use the declare keyword. The declare keyword is used for ambient declarations and methods where we want to define a variable that may exist elsewhere.For example, suppose we have a library called myLibrary that doesn't have a TypeScript declaration file and have a namespace called myLibrary in the global namespace. If we want to use that library in our TypeScript code, we can use the following code:declare var myLibrary; TypeScript runtime will assign the myLibrary variable as any type. Here is a problem that we won't get Intellisense in design time but we will be able to use the library in our code.32) How to generate TypeScript definition file from any .ts file?We can generate TypeScript definition file from any .ts file by using tsc compiler. It will be generating a TypeScript definition which makes our TypeScript file reusable.tsc --declaration file1.ts 33) What is tsconfig.json file?The tsconfig.json file is a file which is in JSON format. In the tsconfig.json file, we can specify various options to tell the compiler how to compile the current project. The presence of a tsconfig.json file in a directory indicates that the directory is the root of a TypeScript project. Below is a sample tsconfig.json file.{ "compilerOptions": { "declaration": true, "emitDecoratorMetadata": false, "experimentalDecorators": false, "module": "none", "moduleResolution": "node" "removeComments": true, "sourceMap": true }, "files": [ "main.ts", "othermodule.ts" ] } To know more click here.34) Explain generics in TypeScript?TypeScript Generics is a tool which provides a way to create reusable components. It is able to create components that can work with a variety of data types rather than a single data type. Generics provides type safety without compromising the performance, or productivity. Generics allow us to create generic classes, generic functions, generic methods, and generic interfaces.In generics, a type parameter is written between the open () brackets which makes it strongly typed collections. Generics use a special kind of type variable that denotes types. The generics collections contain only similar types of objects.function identity(arg: T): T { return arg; } let output1 = identity("myString"); let output2 = identity( 100 ); console.log(output1); console.log(output2); To know more click here.35) Does TypeScript support all object-oriented principles?Yes, TypeScript support all object-oriented principles. There are four main principles to object-oriented programming:Encapsulation,Inheritance,Abstraction, andPolymorphism.36) How to check null and undefined in TypeScript?By using a juggling-check, we can check both null and undefined:if (x == null) { } If we use a strict-check, it will always true for values set to null and won't evaluate as true for undefined variables.Examplevar a: number; var b: number = null; function check(x, name) { if (x == null) { console.log(name + ' == null'); } if (x === null) { console.log(name + ' === null'); } if (typeof x === 'undefined') { console.log(name + ' is undefined'); } } check(a, 'a'); check(b, 'b'); Output"a == null" "a is undefined" "b == null" "b === null" 37) Could we use TypeScript on the backend? If yes, how?Yes, we can use TypeScript on the backend. We can understand it with the following example. Here, we choose Node.js and have some additional type safety and the other abstraction that the language brings.Install Typescript compilernpm i -g typescript The TypeScript compiler takes options in the tsconfig.json file. This file determines where to put built files.{ "compilerOptions": { "target": "es5", "module": "commonjs", "declaration": true, "outDir": "build" } } Compile ts filestsc Runnode build/index.js 38) What is the difference between "interface vs type" statements?interface X { a: number b: string } type X = { a: number b: string }; SNinterfacetype1An interface declaration always introduces a named object type.A type alias declaration can introduce a name for any kind of type, including primitive, union, and intersection types.2An interface can be named in an extends or implements clause.Type alias for an object type literal cannot be named in an extends or implements clause.3Interfaces create a new name that is used everywhere.Type aliases don't create a new name.4An interface can have multiple merged declarations.Type alias for an object type literal cannot have multiple merged declarations.39) What are Ambients in TypeScripts and when to use them?Ambient declarations tell the compiler about the actual source code exist elsewhere. If these source codes do not exist at runtime and we try to use them, then it will break without warning.Ambient declarations files are like docs file. If the source changes, the docs need to be kept updated also. If the ambient declaration file is not updated, then we will get compiler errors.The Ambient declarations allow us to safely and easily use existing popular JavaScript libraries like jquery, angularjs, nodejs, etc.40) What is a TypeScript Map file?TypeScript Map file is a source map file which holds information about our original files..map files are source map files that let tools map between the emitted JavaScript code and the TypeScript source files that created it.Many debuggers can consume these files so we can debug the TypeScript file instead of the JavaScript file.41) What is Type assertions in TypeScript?Type assertion works like a typecasting in other languages, but it doesn't perform type checking or restructuring of data just like other languages can do like C# and Java. The typecasting comes with runtime support whereas type assertion has no impact on runtime. However, type assertions are used purely by the compiler and provide hints to the compiler on how we want our code to be analyzed.Examplelet empCode: any = 111; let employeeCode = code; console.log(typeof(employeeCode)); //Output: number To know more click here.42) What is "as" syntax in TypeScript?The as is the additional syntax for Type assertion in TypeScript. The reason for introducing the as-syntax is that the original syntax () conflicted with JSX.Examplelet empCode: any = 111; let employeeCode = code as number; When using TypeScript with JSX, only as-style assertions are allowed.43) What is JSX? Can we use JSX in TypeScript?JSX is NOTHING BUT Javascript with a different extension. Facebook came up with this new extension so that they can distinguish from the XML-like implementation of HTML in JavaScript.JSX is an embeddable XML-like syntax. It is meant to be transformed into valid JavaScript. JSX came to popularity with the React framework. TypeScript supports embedding, type checking, and compiling JSX directly into JavaScript.To use JSX, we must do two things.Name the files with a .tsx extensionEnable the jsx option44) What is Rest parameters?The rest parameter is used to pass zero or more values to a function. It is declared by prefixing the three dot characters ('...')before the parameter. It allows the functions to have a variable number of arguments without using the arguments object. It is very useful where we have an undetermined number of parameters.Rules to follow in rest parameter:Only one rest parameter is allowed in a function.It must be an array type.It must be a last parameter in the parameter list.function sum(a: number, ...b: number[]): number { let result = a; for (var i = 0; i

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Swift Interview Questions and answers

A list of top frequently asked Blockchain Interview Questions and answers are given below.1) What is Blockchain?A Blockchain is a constantly growing ledger(file) that keeps a permanent record of all the transactions that have taken place, in a secure, chronological, and immutable way. It can be used for the secure transfer of money, property, contracts, etc. without requiring a third-party intermediary like bank or government.Blockchain is the backbone of the most famous cryptocurrency named Bitcoin. It is a peer to peer electronic cash system and a decentralized network which allows users to make transactions directly without the involvement of third-party to manage the exchange of funds.To know more Click Here...Play Videox2) What is the difference between Bitcoin blockchain and Ethereum blockchain?We can see the basic differences between Bitcoin blockchain and Ethereum blockchain in the below table.PointsBitcoin BlockchainEthereum BlockchainFounderSatoshi NakamotoVitalik ButerinRelease Date9 Jan 200830 July 2015Release MethodGenesis Block MinedPresaleUsageDigital CurrencySmart ContractsCryptocurrencyUsedBitcoin EtherAlgorithmSHA-256EthashBlocks Time10 minutes12-14 secondsScalableNot yetYes3) What are the different types of Blockchains?The different types of blockchains which introduce to the world are:There are mainly three types of Blockchains introduced to the world.1. Public BlockchainA Public blockchain is a kind of blockchain which is "for the people, by the people, and of the people." There is no in-charge it means anyone can read, write, and audit the blockchain. It is an open-source, distributed, and decentralizes public ledger so anyone can review anything on a public blockchain. They are considered to be Permissionless blockchain.2. Private BlockchainA Private blockchain is a private property of an individual or an organization. It is controlled by a single organization that determines who can read it, submit the transaction to it, and who can participate in the consensus process. They are considered to be permissioned blockchain.3. Consortium Blockchain or Federated BlockchainIn this blockchain, the consensus process is controlled by a pre-selected group, i.e., group of companies or representative individuals. These pre-selected group is coming together and making decisions for the best benefit of the whole network. Such groups are also called consortiums or a federation that's why the name consortium or federated blockchain.4) Where is a blockchain stored?The blockchain can be either stored as a flat file or as a database.5) What are the types of records that are present in the blockchain database?There are two types of records in a blockchain database.Transactional RecordsBlock RecordsBoth the records can easily be accessed and can integrate with each other without following any complex algorithm.6) List the key features of blockchain?The essential properties of a blockchain are:Decentralized SystemsDistributed ledgerSafer & Secure EcosystemFastLow Transaction FeesFault-TolerantMinting7) How does Blockchain differ from relational databases?The blockchain differs from the relational database in the following ways.PointsBlockchainRelational DatabaseUnit of dataBlockTableFailureNoneCan happenCentralized ControlNoYesModification in dataNot PossiblePossibleSingle Point of FailureDoes not existExists8) Name some popular platforms for developing blockchain applications.Some of the popular platforms for developing blockchain are:EthereumHyperledger SawtoothQuorumRippleR3 CordaQtumIOTAEOS9) What do you mean by blocks in the blockchain technology?A Blockchain consists of a list of records(some or all of the recent transaction). Such records are stored in blocks. Each time a block gets completed, a new block is generated. The block linked with other blocks constitutes a chain of blocks called Blockchain. Each block, after added into the blockchain, will be stored as a permanent database. We cannot delete or reverse any block from the blockchain.To know more Click Here...10) Every block of Blockchain consist of what elements?Every block must include these three things:A hash pointer to the previous blockTimestampList of transactions11) How does a block is recognized in the Blockchain approach?Each block in the blockchain consists of a hash value. The hash value acts as a link to the block which is before it, transaction data and in fact a stamp of time.12) How can blocks be identified?Blocks can be identified by their block height and block header hash.13) Can you modify the data in a block?No, it's not possible to modify the data in a block. In case any modification is required, you would have to erase the information from all other associated blocks too.14) Can you remove a complete block from a network?Yes, it is possible to remove a complete block from a network. There are times when only a specific portion of this online ledger is to be considered. There are default options and filters that can help us do this without making a lot of efforts.15) What type of records can be kept in the Blockchain? Is there any restriction on the same?No, it is not possible to give restriction for keeping records in the blockchain approach. We can put any type of data on a blockchain such as Bank records, health records, images, Facebook messages, etc.Some of the common types of records which can be kept in the blockchain are:Records of medical transactionsTransaction processingIdentity managementEvents related to organizations,Management activitiesDocumentation16) Which cryptographic algorithm is used in Blockchain?Blockchain uses SHA-256 Hashing algorithm. The National Security Agency (NSA) in the USA develop SHA-256 Hashing algorithm.To know more Click Here...17) In what order are the blocks linked in the blockchain?Blockchain always links each block in backward order. In other words, blockchain links each block with its previous block.18) What are the benefits of blockchain?Some of the important benefits of blockchain are:Settlement in real-time: In the financial industry, blockchain can allowing the quicker settlement of trades. It does not take a lengthy process for verification, settlement, and clearance because a single version of agreed-upon data is available between all stack holders.Cost-saving: Blockchain allows peer-to-peer transactions to be completed without the need for a third party such as a bank which reduced overhead costs for exchanging assets.Security and Resilience: Blockchain uses very advanced cryptography to make sure that the information which is going to lock inside the blockchain is secure against hacking attacks and fraud. It uses Distributed Ledger Technology where each party holds a copy of the original chain, so the system remains operative, even the large number of other nodes fall.Immutability: A blockchain register transactions in chronological order, which mean every transaction happens after the previous one. The chronological order certifies the unalterability of all operations in the blockchain. It means when a new block is added to the chain of ledgers, it cannot be removed or modified.User Pseudonymity: It is a state where the user has a consistent identifier which is not the real name of the user. The real identities are only available to administrators. It allows users to communicate with others in a generally anonymous way. It helps to maintain user privacy and enables free transactions without any security worries. In the blockchain, your pseudonym is the address to which you receive Bitcoin. Every transaction which involves that address is stored permanently in the blockchain. If your address is linked to your identity, every transaction will be linked to you. It is always good to every time use a new address for each transaction to avoid the transactions being linked to a common owner.19) What are the Merkle trees? What is its importance in blockchain?Merkle tree is a fundamental part of blockchain technology. It is a mathematical data structure composed of hashes of different blocks of data, and which serves as a summary of all the transactions in a block. It also allows for efficient and secure verification of content in a large body of data. It also helps to verify the consistency and content of the data. Both Bitcoin and Ethereum use Merkle Trees structure. Merkle Tree is also known as Hash Tree.The Merkle tree plays a vital role in blockchain technology. If someone needs to verify the existence of a specific transaction in a block, then there is no need to download the entire block to verify the transaction in a block. He can only download the chain of block headers. It allows downloading a collection of a branch of the tree which contains this transaction is enough. We check the hashes which are relevant to your transactions. If these hashes check out is correct, then we know that this particular transaction exists in this block.To know more Click Here...20) What is Double Spending? Is it possible to double spend in a Blockchain system?Double spending means spending the same money multiple times. In a physical currency, the double-spending problem can never arise. But in digital cash-like bitcoin, the double-spending problem can arise. Hence, in Bitcoin transactions, there is a possibility of being copied and rebroadcasted. It makes it possible that the same bitcoin could be spent twice by its owner. One of the primary aims of Blockchain technology is to eliminate this approach up to the possible extent.Blockchain prevents the double-spending problem by implementing a confirmation mechanism from multiple parties before the actual transaction added to the ledger.To know more Click Here...21) What is a ledger? Name the common type of ledgers that can be considered by users in Blockchain?A ledger is a file that is constantly growing. It keeps a permanent record of all the transactions that have taken place between two parties on the blockchain network.There are three common types of a ledger that can be considered by users in the blockchain:Centralized NetworkDecentralized NetworkDistributed Network22) Why is Blockchain a trusted approach?Blockchain is a trusted approach due to the following reasons:It is easily compatible with other business applications due to its open-source nature.It is safe, hacking proof and encrypted.There is no central authority to control it.All participants agreed to how a transaction inserted into the blockchain.The transaction is immutable means once the transaction inserted into the blockchain, we cannot change it.23) What is mean by DAO?The DAO stands for Decentralized Autonomous Organization. It is an organization that is both autonomous and decentralized. It is represented by rules encoded as a computer program that is transparent, controlled by shareholders, and not influenced by the central government.A DAO can be seen as the most complex form of a smart contract. A smart contract is a computer program that autonomously exists on the Internet, but at the same time, it needs people to perform a task that it can't do by itself.A DAO's financial transaction record and program rules are maintained on a blockchain. Since DAO runs on a blockchain, and it's running on a distributed network, you can have multiple combinations of different parties exchanging value and reaching agreements. It means that, to a Decentralized Autonomous Organization, it doesn't matter if you are a human being or you're a robot. You can actually have devices communicating with devices, or devices communicating with people, or people communicating with people. To DAO, it makes no difference because as long as it's programmed into the collection of smart contracts, the whole thing can run automatically and immutable.To know more Click Here...24) What do you mean by Coinbase transaction?A Coinbase transaction is the first transaction in a block. It is a unique type of bitcoin transaction that can be created by a miner. The miners use it to collect the block reward for their work and any other transaction fees collected by the miner are also sent in this transaction.To know more Click Here...25) What is the difference between blockchain and database?The important differences between the blockchain and database are:SNBlockchainDatabase1.Blockchain is Decentralized. Here, no one is an administrator means everyone is an in-charge.The database is centralized. It has administrators who control all the data.2.Everyone has rights to read and write.Only authorized people can read and write.3.Peer-to-peer architecture.Client-server architecture.4.Here, only Append operation is allowed.CRUD(Create, Read, Update, Delete) mechanism is possible.5.Historical data of digital records.No records of ownership.6.Blockchains are fully confidential.Databases are not fully confidential.7.Blockchain is slow because it depends on the hash rate.The database is fast because fewer people administer it.8.Blockchain is permissionless.The database is permissioned.To know more Click Here...26) What is Cryptocurrency?Cryptocurrency is a digital asset(currencies) which can be used to exchange value between parties. It uses strong cryptography to secure and verify the financial transactions as well as control the creation of new units of that currency. As we know, it is a digital currency, so it doesn't exist physically. Some popular cryptocurrencies are Bitcoin, Litecoin, Z-Cash, Monero, Dash, etc.We know that the government prints the government currencies like fiat currency such as Dollar, Rupees, Yen or Yuan itself. It means there is a centralized institution exists which can create thousands or millions or billions more of that currency. Unlike government currencies like bitcoin, these type of currencies is created by the same mathematical formulas that make the cryptocurrency work. Thus, cryptocurrencies use decentralized control, which works through distributed ledger technology that serves as a public financial transaction database.To know more Click Here...27) What are the limitations of blockchain?The major limitations of blockchain are:Lack of Technical TalentToday, there are a lot of developers available who can do a lot of different things in every field. But in the blockchain technology, there are not so many developers available who have specialized expertise in blockchain technology. Hence, the lack of developers is a hindrance to developing anything on the blockchain.Network SizeBlockchains require a vast network of users. Therefore it is not much resistant to the wrong action as well as it responds to attacks and grows stronger. The blockchain is a robust network with a widely distributed grid of nodes, which makes it more difficult to reap the full benefit.Security FlawBitcoin and other blockchains are associated with one considerable security flaw known as a "51% attack." This security flaw refers to a situation when a group of "miners" takes control of more than half of the blockchain network's computing power. If the miners somehow acquire sufficient computational power, then there is no centralized authority to prevent them from influencing the entire Bitcoin network. It means the attacker can block new transactions from taking place or being confirmed. They are also able to reverse the transactions that have already validated during that same period. Due to this, they could spend coins twice.For this reason, Bitcoin mining pools are closely monitored by the community who ensure that no one gains such network influence.Speed and cost of transactionsThe first few years of the existence of blockchain, transactions cost are "nearly free." But as the network grows, it will NOT be the most cost-effective option of transferring money due to rising transaction costs in the network. From the end of 2016, it processes only seven transactions per second, and each transaction costs around 0.20$.Consensus MechanismIn the blockchain, we know that a block can be created in every 10 minutes. It is because every transaction made must ensure that every block in the blockchain network must reach a common consensus. Depending on the network size and the number of blocks or nodes involved in a blockchain, the back-and-forth communications involved to attain a consensus can consume a considerable amount of time and resources.To know more Click Here...28) What is a 51% attack?The 51% attack on a blockchain network refers to a miner or a group of miners who are trying to control more than 50% of a network's mining power, computing power or hash rate. In this attack, the attacker can block new transactions from taking place or being confirmed. They are also able to reverse transactions that have already confirmed while they were in control of the network, leading to a double-spending problem.To know more Click Here...29) What is encryption? What is its role in Blockchain?We know that the security of data is always matters. Encryption is a process of converting information or data into a code to prevent unauthorized access. It helps organizations to keep their data secure(i.e., prevent unauthorized access). In this technique, the data is encoded or changed into an unreadable format up to some extent before it is sent out of a network by the sender. The only receiver can understand how to decode the same.In Blockchain technology, this approach is very useful because it makes the overall security and authenticity of blocks and help to keep them secure.30) What is the difference between Proof-of-work and Proof-of-stake?The main differences between the Proof of Work and Proof of Stake are:Proof of WorkProof of Work(PoW) algorithm is used to confirm the transaction and creates a new block to the chain. In this algorithm, miners compete against each other to complete the transaction on the network. The process of competing against each other is called mining. It defines an expensive computer calculation. In this, a reward is given to the first miner who solves each blocks problem.Proof of StakeIn the case of PoS algorithm, a set of nodes decide to stake their own cryptocurrencies for the transaction validation. They are called 'stakers.' In proof of stake, the creator of a new block is chosen in a deterministic way, depending on its wealth, also defined as stake. It does not give any block reward, so miners take the transaction fees only. Proof-of-Stake can be several thousand times more cost-effective as compared to proof of work.31) How does the security of a block works?A blockchain is a chain of blocks that contain records of transactions. Block is the most secure part of a blockchain. The record of a blockchain is protected through a cryptographic hash algorithm. Each block is connected with all other blocks before and after it through a distinctive hash pointer which adds more security to the block. If the value within a block is modified, the hash value will also change. This hash is a security identifier which provides a reasonable level of security to the whole blockchain.Ambitious hackers also need to know the hash key of the previous block to make changes to the block information. For those ambitious hackers, blockchains are decentralized and distributed across peer-to-peer networks that are continuously updated and keep syncing. Since these records are not contained in a central location, so blockchains don't have a single point of failure and cannot be changed from a single computer.32) What is the difference between public and private key?The private key is used to encrypt or lock a message or transaction which is sent on the blockchain network. The sender can send a message using the public key of the receiver. On the other hand, the receiver can decrypt the message or the transaction using his private key. By using the private and public key, the communication or transaction is kept safe and tamper-proof.33) Name the platforms that are actively developing Blockchain applications?Blockchain technology was first used for financial transactions. But nowadays, its scope is increasing and applies in a variety of industries like e-commerce, data management, energy, gaming, e-governance, and many more. There are several commercial and open-source platforms available to provide the framework for creating applications that support a blockchain. Hyperledger and Ethereum are actively improving the blockchain ecosystem by creating advanced cross-industry blockchain technologies.Hyperledger is an open-source collaboration that provides tools and techniques for developing an enterprise-grade blockchain solution. While Ethereum is an open-source and leading platform designed for developers, organizations, and business to build and deploy blockchain applications.34) How does bitcoin use blockchain?A transaction is a transfer of value between Bitcoin wallets that gets included in the blockchain. Bitcoin wallets keep a secret piece of data called a private key. The private key is used to sign transactions and provide mathematical proof that they have come from the owner of the wallet.35) What is Consensus algorithm?The consensus algorithm is the method of gaining consensus on a change of data over the system or distributed network. Consensus algorithms are heavily used in blockchains as they enable the network of unknown nodes to reach consensus on the data that is being stored or shared through the blockchain.36) What are the types of consensus algorithms?There are many types of consensus algorithms or techniques available. The most popular consensus algorithm is:Proof-of-Work(PoW)Proof-of-Stake(PoS)Delegated Proof-of-Stake(DPoS)Proof-of-Authority(PoA)Proof-of-Elapsed Time(PoET)Byzantine Fault Tolerance

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Published - Tue, 06 Dec 2022

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Blockchain Interview Questions and Answers

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Published - Tue, 06 Dec 2022

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Bitcoin Interview Questions and answers

A list of top frequently asked Bitcoin Interview Questions and answers are given below.1) What is Bitcoin?A bitcoin is a type of digital currency which can be bought, sold, and transfer between the two parties securely over the internet. It cannot be touched and seen, but it can be traded electronically. We can store it in our mobiles, computers or any other storage media as a virtual currency. Bitcoin can store values much like fine gold, silver, and some other type of investments. It can be used to buy products and services as well as make payments and exchange values electronically. It is the most popular cryptocurrency in the world.To read more information, Click Here...2) What do you mean by Bitcoin Mining?Bitcoin mining is performed by bitcoin miners(a group of people). The procedure of bitcoin mining is done by specialized computers equipped for solving algorithmic equations. Miners achieve bitcoin mining by solving a computational problem which makes the chain of blocks of transactions. These specialized computers help miners to authenticate the block of transaction held within each bitcoin network. Whenever a new block added into the blockchain, immediately miners get rewards for this new block. The miners get rewards in bitcoin along with transaction fees.Play Videox3) Who developed Bitcoin?Bitcoin was invented by an unknown person Satoshi Nakamoto in the year 2008. But there is no valid proof for this because the person behind bitcoin has never given an interview. It was released as open-source software in 2009. It was the first successful virtual currency designed with faith and equivalent to authorized currency of centralized government. It is a digital currency that uses rules of cryptography for regulation and generation of units of currency. It is commonly called decentralized digital currency.To read more information, Click Here...4) Who governs Bitcoin?Bitcoin is not a company, so no one can govern the Bitcoin. Bitcoin is decentralized digital money that is issued and managed without any centralized authority. It is created as a reward in a competition in which miners who own the specialized computer offer their computing power to verify and generate new Bitcoins. They are also responsible for maintaining the security of the network into the blockchain. The activity of creating a bitcoin is known as mining, and every successful miner gets a reward with newly created bitcoins and transaction fees.5) What is a Bitcoin wallet?A Bitcoin wallet(digital wallet) is a software program where Bitcoins are stored. Technically, a Bitcoin wallet is stored a private key(secret number) for every Bitcoin address. The owner of the wallet can send, receive, and exchange bitcoins. The Bitcoin wallet is of many forms, and some of them are a desktop wallet, mobile wallet, web wallet, and hardware wallet.To read more information, Click Here...6) How can you choose a Bitcoin wallet?Choosing the best bitcoin wallet is the most important step in becoming a Bitcoin user. There are two initial steps to finding a Bitcoin wallet given below:Decide what sort of crypto wallet you needConsider specific wallets to find the best one for you.Bitcoin wallets differ in many ways, such as security, convenience, level of privacy, coin support, and anonymity, customer support, user interface, fees, built-in services, and other variables.The most common distinction in choosing Bitcoin wallets is whether they are a cold wallet or hot wallet.Cold: The cold wallets refer to offline storage of bitcoins. These type of wallets are less convenient for frequent use, but they are more secure.Hot: The hot wallets are connected to the internet most of the time. These type of wallets are suitable for daily use, but they are not secure.Here, I will take an example of a page called bitcoin.org to choose a wallet. Bitcoin.org is a very good starting point to explain how to choose your wallet because there is a lot of options available. In this page, we will go to an option called Choose your wallet and decides the wallet type which you wants. These wallets are a desktop wallet, mobile wallet, web wallet, and hardware wallet.To read more information, Click Here...7) What is a Bitcoin address?A bitcoin address is a unique identifier which consists of 26-35 alphanumeric characters. The identifier begins with the number 1 or 3, which represents a location where the cryptocurrencies can be sent. The bitcoin user can generate a bitcoin address without any cost. However, the bitcoin address is not permanent, that means it may change for every new transaction.There are currently three standard address formats in use:P2PKH: It always begins with the number 1, e.g., 1BvBMSEYvtWesqTFn5Au4n4GFg7xJaNVN2.P2SH: It always begins with the number 3, e.g., 3J78t1WpEZ72CMnQviedrnyiWrnqRhWMLy.Bech32: It always begins with bc1, e.g., bc1qat0srrr7xdkvy5l643lxcnw9re59gtzxwf5ndq.8) Is Bitcoin Anonymous?No, bitcoin is not completely anonymous; instead, it is pseudonymous, i.e. every identity is tied with the fake name. It is because each user has a public address, and whenever there are financial transactions occur, the fraudsters will survive to trace that addresses.9) Who sets the Bitcoin price?The price of bitcoin is determined by the market in which it trades. It is determined by how much someone is willing to pay for that bitcoin. The market sets the price of bitcoin as same as Gold, Oil, Sugar, Grains, etc. is determined. Bitcoin, like any other market, is subject to the rules of supply and demand. i.e.,More Demand, Less Supply = Price Goes Up More Supply, Less Demand = Price Goes Down No one, in particular, sets the bitcoin's price nor we can trade it in one place. Each market/exchange determines its price based on supply and demand.To read more information, Click Here...10) Why are Bitcoin prices fluctuating?The price of bitcoin is fluctuating because it is very volatile in nature. Since the number of bitcoins is limited in circulation, new bitcoins are created at a decreasing rate. It means that demand must follow this level of inflation to keep the price stable. The bitcoin market is still relatively small as compared to other industries. Therefore it does not take significant amounts of money to move the market price up or down.To read more information, Click Here...11) How is Bitcoin purchased?We can purchase the bitcoin from many sources. Some of them are given below.It can be purchased from online with the help of credit cards or other e-wallets like PayPal etc.It can also be purchased with the help of LocalBitcoins and from Bitcoin Teller Machines, which is equivalent to Cash vending ATMs.Bitcoin.com provides a list of authenticated online exchanges centres where you can sell and purchase Bitcoins.12) How can you sell Bitcoins?We can sell Bitcoins in many ways. We can sell it online to an exchange or some other people who live nearby. It can be sold in the same way as it can be purchased. The price of bitcoin fluctuates regularly as per the demand and supply. It can also be sold through bitcoin ATMs, which allow selling and buying of Bitcoins. The transaction fees of bitcoin are the lowest amongst all bank charges applied globally.13) Can stores accept Bitcoins?As we know, anyone can accept Bitcoin. Many B2B services and hardware installation are available for the convenience of the storeowners. All these business organizations give invoicing and accounting with their services. All third party services are not compulsory. Individuals can also transact and invoice on their own.14) How can you convert Bitcoin into Fiat currencies?It is very important to know how to cash out bitcoin or withdraw from bitcoins into fiat currency (USD, EUR, INR), which will be acceptable in their native countries. There are some easy ways listed below which convert BTC into USD, INR, EUR or GBP. Before picking any of the listed methods, you need to find out how you want to receive your fiat currency. You can sell Bitcoins in person for cash or can sell it on exchanges and get the money directly into your bank account.Cryptocurrency ExchangeBitcoin Debit cardSelling bitcoinsBitcoin ATMsTo read more information, Click Here...15) Can I mine Bitcoins?Bitcoin mining is not an easy process. It requires specialized computers which can perform the calculation of large mathematical algorithm. These specialized computers are very costly, and power consumption has gone extremely high. For installation of one such computer or machine, you have to check for a cost-effective environment which is not easy these days. Today, Bitcoin mining machines are constantly being upgraded, and the moment becomes obsolete. Therefore, it will be very difficult to mine any more Bitcoin.16) Can I trade bitcoin without selling at an exchange?Yes, it is possible to trade bitcoins directly without selling at an exchange. Many people prefer this because of their security and trust. Many exchanges were hacked in recent time, and the result of this, their bitcoins vanished without any explanation.Another reason is its privacy. These days exchanges have similar KYC requirements as like banks needs. The KYC information is at risk of theft if the security of the exchange up to date.17) What can I buy with Bitcoins?We can purchase anything with bitcoins that are legally sold in the world like clothing, electronics, food and art to handmade crafts. Bitcoin can also be used to buy large items like cars, real estate, and investment vehicles such as precious metals. If you buy anything from Amazon through bitcoin, you can get up to 20% discount. Some others also give a discount to people who pay with the digital currency. Bitcoin has its own stores where you can buy T-shirts, bag, hoodie, accessories, etc.18) Is Bitcoin legal?Bitcoin is legal in many countries in the world, but some countries state that they have banned its use, such as India, China, and Ecuador. The cryptocurrencies regulations can vary from country to country so you should have to do a proper search before the initiation of bitcoin transaction in any organization. Wikipedia and many other online services have a great guide on how Bitcoin is treated in all the countries around the world with its regulatory policies.19) How does Bitcoin work?Each Bitcoin is a computer file which is stored as a digital wallet in smartphones or computer and functions similar to any e-wallet app. Bitcoins use his currency in a digitalized form which has its limits of production and limited to 21 million Bitcoins only. You can send Bitcoins to your digital wallet and then can send Bitcoins to other people. Every single bitcoin transaction is recorded in a public ledger called the blockchain. The blockchain makes it possible to trace the history of Bitcoins to stop people from spending bitcoins they do not own. It also restricts to make copies or undoing transactions.20) What are the advantages of bitcoin?Following are the benefits of Bitcoins:It is accepted worldwide at the same rates, and there is no risk of depreciation or appreciation.It has the lowest transactional fees in the world.It has fewer risks and irreversible transaction benefitting merchants.It is fully Secured and control by the cryptographic encryption algorithm.It is the transparent & neutral mode of administration as anyone can check data in real-time.21) What are the disadvantages of Bitcoin?Following are the disadvantages: of bitcoins.Degree of Acceptance: In Bitcoin, the Degree of Acceptance is very low because many people are still unaware of its benefits.Volatile: Total number of Bitcoins in circulation is very small, so even a small change can make the price of the Bitcoin volatile.Ongoing Development: Bitcoins software is still in beta form, and many incomplete features are in active development22) What is mean by Unconfirmed Transaction?An unconfirmed transaction is that transaction that has not been included in a block, and not completed also. Every transaction requires at least one confirmation to complete the transaction.The common reasons for unconfirmed transactions are:You have made the transfer. The Bitcoin network needs at least 10 minutes to include the transaction in a block.The blockchain fee is very low. Thus, the lower the transaction fee, the lower your transaction's priority in the Bitcoin network. Therefore, it takes longer confirmation to be a valid transaction.23) Who controls the Bitcoin network?Bitcoin network is the term used to describe all the servers which are mining the various transactions undertaken with bitcoin. No one particularly can control the Bitcoin network. All Bitcoin users around the world control it. To be compatible with each other, all bitcoin users need to use software that is complying with the same rules. Bitcoin mining can only work correctly with a complete consensus among all users. Therefore, all users and developers have a strong incentive to protect this consensus.24) What is the price of one Bitcoin? Can I buy a part of one Bitcoin?The buying rate for one Bitcoin as of April 2019 is approximately 3,67,569.51 Indian Rupees. The price of bitcoin would be changed every second. If you do not want to buy one bitcoin whole, you can buy a fraction of a Bitcoin also. It is because each bitcoin can be divided up to 8 decimals(0.00000001). For instance, you can buy Bitcoin for Rs 1000 or Rs 5,000.25) Is it legal to buy and sell Bitcoin from India?It is not illegal to buy and sell bitcoins in India. There is no law in India which declares it illegal. In India, the cusp of a digital revolution is yet to recognize the cryptocurrency officially. The Reserve bank of India(RBI), which regulates Indian rupee, had earlier cautioned users, holders and traders of Virtual currencies including Bitcoins.Any central bank or monetary authority do not authorize the creation, trading or usage of Bitcoins as a medium for payment. There are no regulatory approvals, registration or authorization is stated to have been obtained by the entities concerned for carrying on such activities. However, the central bank has not unequivocally banned Bitcoins in the country.26) How do bitcoin transactions work?A transaction is a transfer of value between Bitcoin wallets of sender and receiver in the blockchain network. Each bitcoin transaction is composed of an amount. The amount is the input (sending address), an output (receiver's address), and the private keys that allow spending of Bitcoins from an individual's account. The blockchain is a database which maintains the transaction history since bitcoin's inception.27) What steps should you take to safeguard themselves from Bitcoin fraud?The basic advice is that you should not invest in anything that you does not understand. There are many schemes and scams available around bitcoin mining. A blockchain is a high-risk technology, it has potential, but we never guarantee anything. There is no way as a guaranteed return in the Bitcoin world. On the Zebpay home page, there is a section that lists about frauds and schemes and advises users on how to protect themselves.28) What is the difference between Bitcoin and Blockchain?SNBlockchainBitcoin1.Blockchain is a ledger with cryptographic integrity.Bitcoin is a cryptocurrency.2.Blockchain can easily transfer anything from currencies to property rights of stocks.Bitcoin is limited to trading as currency.3.It has a broad scope because of open-source.It has a limited scope and is less flexible.4.It provides a low cost safe and secure environment for a peer-to-peer transaction.To simplify and increase the speed of transaction without much of government restrictions.5.It is transparent as it must comply with KYC for every business.It can be termed as anonymous because there are no regulatory framework and standards that have been followed by bitcoin.

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Published - Tue, 06 Dec 2022

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General Aptitude

What is General Aptitude?An exam called general aptitude is used to evaluate an applicant’s aptitude. To address challenging and intricate situations, logic is used in the process. It is an excellent method for determining a person’s degree of intelligence. Determining whether the applicant is mentally fit for the position they are applying for is a solid strategy.Regardless of the level of experience a candidate has, a general aptitude test enables the recruiter to gauge how well the candidate can carry out a task.Because of this, practically all tests, including those for the UPSC, Gate, and job recruiting, include general aptitude questions. To assist all types of students, a large range of general aptitude books are readily available on the market.What are the different types of general aptitude tests?A candidate’s aptitude and intellect can be assessed using the broad category of general aptitude, which covers a wide range of topics. These assessments aid in determining a candidate’s capacity for logic, language, and decision-making. Let’s examine the several general aptitude test categories that are mentioned as follows:Verbal AbilityAbility to Analyzenumerical aptitudespatial awarenessDifferent general aptitude syllabi are used for exams like Gate, UPSC, CSIR, Law, etc.Structure of Aptitude TestThe next step is to comprehend how the general aptitude test is structured. Depending on the type of exam, it often consists of multiple-choice questions and answers organised into various sections. However, the test’s format remains the same and is as follows:Multiple-choice questions are present in every segment.The assignment may include contain mathematical calculations or true-false questions.The inquiry is designed to gather data as rapidly as possible and offer accurate responses.Additionally, it evaluates the candidate’s capacity for time management.Additionally, many competitive tests feature negative markings that emphasise a candidate’s decision-making under pressure.Tips to ace the Aptitude TestCandidates who are taking their general aptitude tests can benefit from some tried-and-true advice. They include some of the following:An aptitude test can be passed with practise. Your chances of passing the exam increase as you practise more.Knowing everything there is to know about the test format beforehand is the second time-saving tip.If you take a practise test, which will help you identify your strong or time-consuming area, pay closer attention.In these tests, time management is crucial, so use caution.Prior to the exam, remain calm.Before the exam, eat well and get enough sleep.Spend as little time as possible on any one question. If you feel trapped, change to a different one.Exam guidelines should be carefully readPractice Questions on General AptitudeSince we went through an array of important topics for General Aptitude above, it is also important to practice these concepts as much as possible. To help you brush up your basics of General aptitude, we have created a diversified list of questions on this section that you must practice.Q1. For instance, if 20 workers are working on 8 hours to finish a particular work process in 21 days, then how many hours are going to take for 48 workers to finish the same task in 7 days?A.12B. 20C. 10D. 15Answer: 10 Q2. If a wholesaler is earning a profit amount of 12% in selling books with 10% of discount on the printed price. What would be the ratio of cost price which is printed in the book?A. 45:56B. 50: 61C. 99:125D. None of theseAnswers: 45:56Q3. Let’s say it takes 8 hours to finish 600 kilometers of the trip. Say we will complete 120 kilometers by train and the remaining journey by car. However, it will take an extra 20 minutes by train and the remaining by car. What would be the ratio of the speed of the train to that of the car?A. 3:5B. 3:4C. 4:3D. 4:5Answer: B Q4. What is the value of m3+n3 + 3mn if m+n is equal to 1?A. 0B. 1C. 2D. 3Answer: 1Q5. Let’s assume subject 1 and subject 2 can work on a project for 12 consecutive days. However, subject 1 can complete the work in 30 days. How long it will take for the subject 2 to finish the project?A: 18 daysB: 20 daysC: 15 daysD: 22 daysAnswer: 20 DaysExploring General Aptitude Questions? Check Out Our Exclusive GK Quiz!Q6. What is known as a point equidistant which is vertices of a triangle?A. IncentreB. CircumcentreC. OrthocentreD. CentroidAnswer: CircumcentreQ7. What is the sum of the factors of 4b2c2 – (b2 + c2 – a2) 2?A. a+b+cB. 2 (a+b+c)C. 0D. 1Answer: 2(a+b+c)While practising these General Aptitude questions, you must also explore Quantitative Aptitude!Q8: What is the role of boys in the school if 60% of the students in a particular school are boys and 812 girls?A. 1128B. 1218C. 1821D. 1281Answer: 1218 Q9. Suppose cos4θ – sin4θ = 1/3, then what is the value of tan2θ?A. 1/2B. 1/3C. 1/4D. 1/5Answer: 1/2 Q10: What could be the value of tan80° tan10° + sin270° + sin20° is tan80° tan10° + sin270° + sin20°?A. 0B. 1C. 2D. √3/2Answer: 2Recommended Read: Reasoning QuestionsFAQsIs the general aptitude test unbiased?Yes, these exams are created to provide each candidate taking them a fair advantage.How do I get ready for an all-purpose aptitude test?The most important thing is to obtain the exam’s syllabus and then study in accordance with it.Is it appropriate to take a practise exam to get ready for an aptitude test?Absolutely, practise is essential to ace the aptitude test. Several online study portals offer practise exams for a specific exam to assist you with the same.What are the types of aptitude?Some of the types of aptitude are mentioned belowLogical aptitude.Physical aptitude.Mechanical aptitude.Spatial aptitude.STEM aptitude.Linguistic aptitude.Organisational aptitude.What is an example of a general aptitude test?The Scholastic Assessment Test (SAT) can be taken as a general aptitude test.Hence, we hope that this blog has helped you understand what general aptitude is about as well as some essential topics and questions under this section. If you are planning for a competitive exam like GMAT, SAT, GRE or IELTS, and need expert guidance, sign up for an e-meeting with our Leverage Edu mentors and we will assist you throughout your exam preparation, equipping you with study essentials as well as exam day tips to help you soar through your chosen test with flying colours!

Fri, 16 Jun 2023

LabCorp Interview Questions & Answers:

1. What type of people do you not work well with?Be very careful answering this question as most organization employ professionals with an array of personalities and characteristics. You don't want to give the impression that you're going to have problems working with anyone currently employed at the organization. If you through out anything trivial you're going to look like a whiner. Only disloyalty to the organization or lawbreaking should be on your list of personal characteristics of people you can't work with.2. How did you hear about the position At LabCorp?Another seemingly innocuous interview question, this is actually a perfect opportunity to stand out and show your passion for and connection to the company and for job At LabCorp. For example, if you found out about the gig through a friend or professional contact, name drop that person, then share why you were so excited about it. If you discovered the company through an event or article, share that. Even if you found the listing through a random job board, share what, specifically, caught your eye about the role.3. Your client is upset with you for a mistake you made, how do you react?Acknowledge their pain - empathize with them. Then apologize and offer a solution to fix the mistake.4. How well do you know our company?Well, a developed company that is gradually building their reputation in the competitive world.5. Tell me why do you want this job At LabCorp?Bad Answer: No solid answer, answers that don't align with what the job actually offers, or uninspired answers that show your position is just another of the many jobs they're applying for.Good answer: The candidate has clear reasons for wanting the job that show enthusiasm for the work and the position, and knowledge about the company and job.6. Tell me about a problem that you've solved in a unique or unusual way. What was the outcome? Were you happy or satisfied with it?In this question the interviewer is basically looking for a real life example of how you used creativity to solve a problem.7. What can you offer me that another person can't?This is when you talk about your record of getting things done. Go into specifics from your resume and portfolio; show an employer your value and how you'd be an asset.You have to say, “I'm the best person for the job At LabCorp. I know there are other candidates who could fill this position, but my passion for excellence sets me apart from the pack. I am committed to always producing the best results. For example…”8. What education or training have you had that makes you fit for this profession At LabCorp?This would be the first question asked in any interview. Therefore, it is important that you give a proper reply to the question regarding your education. You should have all the documents and certificates pertaining to your education and/or training, although time may not allow the interviewer to review all of them.9. If you were given more initiatives than you could handle, what would you do?First prioritize the important activities that impact the business most. Then discuss the issue of having too many initiatives with the boss so that it can be offloaded. Work harder to get the initiatives done.10. What do you consider to be your greatest achievement so far and why?Be proud of your achievement, discuss the results, and explain why you feel most proud of this one. Was it the extra work? Was it the leadership you exhibited? Was it the impact it had?Download Interview PDF 11. What is your dream job?There is almost no good answer to this question, so don't be specific. If you tell the interviewer that the job you're applying for with his/her company is the perfect job you may loose credibility if you don't sound believable (which you probably won't if you're not telling the truth.) If you give the interviewer some other job the interviewer may get concerned that you'll get dissatisfied with the position if you're hired. Again, don't be specific. A good response could be, “A job where my work ethic and abilities are recognized and I can make a meaningful difference to the organization.”12. Are you currently looking at other job opportunities?Just answer this question honestly. Sometime an employer wants to know if there are other companies you're considering so that they can determine how serious you are about the industry, they're company and find out if you're in demand. Don't spend a lot of time on this question; just try to stay focused on the job you're interviewing for.13. Why do you want this job At LabCorp?This question typically follows on from the previous one. Here is where your research will come in handy. You may want to say that you want to work for a company that is Global Guideline, (market leader, innovator, provides a vital service, whatever it may be). Put some thought into this beforehand, be specific, and link the company's values and mission statement to your own goals and career plans.14. What did you dislike about your old job?Try to avoid any pin point , like never say “I did not like my manager or I did not like environment or I did not like team” Never use negative terminology. Try to keep focus on every thing was good At LabCorp , I just wanted to make change for proper growth.15. If you were hiring a person for this job At LabCorp, what would you look for?Discuss qualities you possess required to successfully complete the job duties.16. If the company you worked for was doing something unethical or illegal, what would you do?Report it to the leaders within the company. True leaders understand business ethics are important to the company's longevity17. Tell me a difficult situation you have overcome in the workplace?Conflict resolution, problem solving, communication and coping under pressure are transferable skills desired by many employers At LabCorp.Answering this question right can help you demonstrate all of these traits.☛ Use real-life examples from your previous roles that you are comfortable explaining☛ Choose an example that demonstrates the role you played in resolving the situation clearly☛ Remain professional at all times – you need to demonstrate that you can keep a cool head and know how to communicate with people18. Tell us something about yourself?Bad Answer: Candidates who ramble on about themselves without regard for information that will actually help the interviewer make a decision, or candidates who actually provide information showing they are unfit for the job.Good answer: An answer that gives the interviewer a glimpse of the candidate's personality, without veering away from providing information that relates to the job. Answers should be positive, and not generic.19. How do you handle confidentiality in your work?Often, interviewers will ask questions to find out the level of technical knowledge At LabCorp that a candidate has concerning the duties of a care assistant. In a question such as this, there is an opportunity to demonstrate professional knowledge and awareness. The confidentiality of a person's medical records is an important factor for a care assistant to bear in mind.20. What are you looking for in a new position At LabCorp?I've been honing my skills At LabCorp for a few years now and, first and foremost, I'm looking for a position where I can continue to exercise those skills. Ideally the same things that this position has to offer. Be specific.21. What motivates you at the work place?Keep your answer simple, direct and positive. Some good answers may be the ability to achieve, recognition or challenging assignments.22. Can you describe your ideal boss/supervisor?During the interview At LabCorp process employers will want to find out how you respond to supervision. They want to know whether you have any problems with authority, If you can work well as part of a group (see previous question) and if you take instructions well etc.Never ever ever, criticize a past supervisor or boss. This is a red flag for airlines and your prospective employer will likely assume you are a difficult employee, unable to work in a team or take intruction and side with your former employer.23. Why are you leaving last job?Although this would seem like a simple question, it can easily become tricky. You shouldn't mention salary being a factor at this point At LabCorp. If you're currently employed, your response can focus on developing and expanding your career and even yourself. If you're current employer is downsizing, remain positive and brief. If your employer fired you, prepare a solid reason. Under no circumstance should you discuss any drama or negativity, always remain positive.24. What motivates you?I've always been motivated by the challenge – in my last role, I was responsible for training our new recruits and having a 100% success rate in passing scores. I know that this job is very fast-paced and I'm more than up for the challenge. In fact, I thrive on it.25. Tell me about a time when you had to use your presentation skills to influence someone's opinion At LabCorp?Example stories could be a class project, an internal meeting presentation, or a customer facing presentation.Download Interview PDF 26. How do you handle conflicts with people you supervise?At first place, you try to avoid conflicts if you can. But once it happens and there's no way to avoid it, you try to understand the point of view of the other person and find the solution good for everyone. But you always keep the authority of your position.27. Why should I hire you At LabCorp?To close the deal on a job offer, you MUST be prepared with a concise summary of the top reasons to choose you. Even if your interviewer doesn't ask one of these question in so many words, you should have an answer prepared and be looking for ways to communicate your top reasons throughout the interview process.28. How have you shown yourself to be a leader?Think about a time where you've rallied a group of people around a cause / idea / initiative and successfully implemented it. It could be a small or large project but the key is you want to demonstrate how you were able to lead others to work for a common cause.29. How do you deal with conflict in the workplace At LabCorp?When people work together, conflict is often unavoidable because of differences in work goals and personal styles. Follow these guidelines for handling conflict in the workplace.☛ 1. Talk with the other person.☛ 2. Focus on behavior and events, not on personalities.☛ 3. Listen carefully.☛ 4. Identify points of agreement and disagreement.☛ 5. Prioritize the areas of conflict.☛ 6. Develop a plan to work on each conflict.☛ 7. Follow through on your plan.☛ 8. Build on your success.30. What have you done to reduce costs, increase revenue, or save time?Even if your only experience is an internship, you have likely created or streamlined a process that has contributed to the earning potential or efficiency of the practice. Choose at least one suitable example and explain how you got the idea, how you implemented the plan, and the benefits to the practice.31. How do you feel about giving back to the community?Describe your charitable activities to showcase that community work is important to you. If you haven't done one yet, go to www.globalguideline.com - charitable work is a great way to learn about other people and it's an important part of society - GET INVOLVED!32. What can you tell me about team work as part of the job At LabCorp?There is usually a team of staff nurses working in cooperation with each other. A team of nurses has to get along well and coordinate their actions, usually by dividing their responsibilities into sectors or specific activities. They help each other perform tasks requiring more than one person.33. What is your perception of taking on risk?You answer depends on the type of company you're interviewing for. If it's a start up, you need to be much more open to taking on risk. If it's a more established company, calculated risks to increase / improve the business or minimal risks would typically be more in line.34. How would your former employer describe you?In all likelihood, the interviewer will actually speak with your former employer so honesty is key. Answer as confidently and positively as possible and list all of the positive things your past employer would recognize about you. Do not make the mistake of simply saying you are responsible, organized, and dependable. Instead, include traits that are directly related to your work as a medical assistant, such as the ability to handle stressful situations and difficult patients, the way you kept meticulous records, and more.35. Describe your academic achievements?Think of a time where you really stood out and shined within college. It could be a leadership role in a project, it could be your great grades that demonstrate your intelligence and discipline, it could be the fact that you double majored. Where have you shined?36. What do you consider to be your weaknesses?What your interviewer is really trying to do with this question-beyond identifying any major red flags-is to gauge your self-awareness and honesty. So, “I can't meet a deadline to save my life At LabCorp” is not an option-but neither is “Nothing! I'm perfect!” Strike a balance by thinking of something that you struggle with but that you're working to improve. For example, maybe you've never been strong at public speaking, but you've recently volunteered to run meetings to help you be more comfortable when addressing a crowd.37. What do you feel you deserve to be paid?Do your research before answering this question - first, consider what the market average is for this job. You can find that by searching on Google (title followed by salary) and globalguideline.com and other websites. Then, consider this - based on your work experience and previous results, are you above average, if yes, by what % increase from your pay today from your perspective? Also - make sure if you aim high you can back it up with facts and your previous results so that you can make a strong case.38. Did you get on well with your last manager?A dreaded question for many! When answering this question never give a negative answer. “I did not get on with my manager” or “The management did not run the business well” will show you in a negative light and reduce your chance of a job offer. Answer the question positively, emphasizing that you have been looking for a career progression. Start by telling the interviewer what you gained from your last job At LabCorp39. Do you have the ability to articulate a vision and to get others involved to carry it out?If yes, then share an example of how you've done so at work or college. If not, then discuss how you would do so. Example: "I would first understand the goals of the staff members and then I would align those to the goals of the project / company. Then I would articulate the vision of that alignment and ask them to participate. From there, we would delegate tasks among the team and then follow up on a date and time to ensure follow through on the tasks. Lastly, we would review the results together."40. What differentiates this company from other competitors?Be positive and nice about their competitors but also discuss how they are better than them and why they are the best choice for the customer. For example: "Company XYZ has a good product, but I truly believe your company has a 3-5 year vision for your customer that aligns to their business needs."Download Interview PDF 41. Tell me an occasion when you needed to persuade someone to do something?Interpersonal relationships are a very important part of being a successful care assistant. This question is seeking a solid example of how you have used powers of persuasion to achieve a positive outcome in a professional task or situation. The answer should include specific details.42. What is your greatest strength? How does it help you At LabCorp?One of my greatest strengths, and that I am a diligent worker... I care about the work getting done.. I am always willing to help others in the team.. Being patient helps me not jump to conclusions... Patience helps me stay calm when I have to work under pressure.. Being a diligent worker.. It ensures that the team has the same goals in accomplishing certain things.43. Explain me about a challenge or conflict you've faced at work At LabCorp, and how you dealt with it?In asking this interview question, your interviewer wants to get a sense of how you will respond to conflict. Anyone can seem nice and pleasant in a job interview, but what will happen if you're hired?. Again, you'll want to use the S-T-A-R method, being sure to focus on how you handled the situation professionally and productively, and ideally closing with a happy ending, like how you came to a resolution or compromise.44. Why are you interested in this type of job At LabCorp?You're looking for someone who enjoys working with the elderly, or a caring, sociable, and nurturing person.45. What is the most important lesson / skill you've learned from school?Think of lessons learned in extra curricular activities, in clubs, in classes that had a profound impact on your personal development. For example, I had to lead a team of 5 people on a school project and learned to get people with drastically different personalities to work together as a team to achieve our objective.46. What is it about this position At LabCorp that attracts you the most?Use your knowledge of the job description to demonstrate how you are a suitable match for the role.47. How important is a positive attitude to you?Incredibly important. I believe a positive attitude is the foundation of being successful - it's contagious in the workplace, with our customers, and ultimately it's the difference maker.48. Why should we select you not others?Here you need to give strong reasons to your interviewer to select you not others. Sell yourself to your interviewer in interview in every possible best way. You may say like I think I am really qualified for the position. I am a hard worker and a fast learner, and though I may not have all of the qualifications that you need, I know I can learn the job and do it well.”49. If you were an animal, which one would you want to be?Seemingly random personality-test type questions like these come up in interviews generally because hiring managers want to see how you can think on your feet. There's no wrong answer here, but you'll immediately gain bonus points if your answer helps you share your strengths or personality or connect with the hiring manager. Pro tip: Come up with a stalling tactic to buy yourself some thinking time, such as saying, “Now, that is a great question. I think I would have to say… ”50. What is your biggest regret to date and why?Describe honestly the regretful action / situation you were in but then discuss how you proactively fixed / improved it and how that helped you to improve as a person/worker.51. Describe to me the position At LabCorp you're applying for?This is a “homework” question, too, but it also gives some clues as to the perspective the person brings to the table. The best preparation you can do is to read the job description and repeat it to yourself in your own words so that you can do this smoothly at the interview.52. What was the most important task you ever had?There are two common answers to this question that do little to impress recruiters:☛ ‘I got a 2.1'☛ ‘I passed my driving test'No matter how proud you are of these achievements, they don't say anything exciting about you. When you're going for a graduate job, having a degree is hardly going to make you stand out from the crowd and neither is having a driving licence, which is a requirement of many jobs.53. How would you observe the level of motivation of your subordinates?Choosing the right metrics and comparing productivity of everyone on daily basis is a good answer, doesn't matter in which company you apply for a supervisory role.54. Do you have good computer skills?It is becoming increasingly important for medical assistants to be knowledgeable about computers. If you are a long-time computer user with experience with different software applications, mention it. It is also a good idea to mention any other computer skills you have, such as a high typing rate, website creation, and more.55. Where do you see yourself professionally five years from now At LabCorp?Demonstrate both loyalty and ambition in the answer to this question. After sharing your personal ambition, it may be a good time to ask the interviewer if your ambitions match those of the company.Download Interview PDF 56. Give me an example of an emergency situation that you faced. How did you handle it?There was a time when one of my employers faced the quitting of a manager in another country. I was asked to go fill in for him while they found a replacement and stay to train that person. I would be at least 30 days. I quickly accepted because I knew that my department couldn't function without me.57. How have you changed in the last five years?All in a nutshell. But I think I've attained a level of personal comfort in many ways and although I will change even more in the next 5-6 years I'm content with the past 6 and what has come of them.58. Explain an idea that you have had and have then implemented in practice?Often an interview guide will outline the so-called ‘STAR' approach for answering such questions; Structure the answer as a situation, task, action, and result: what the context was, what you needed to achieve, what you did, and what the outcome was as a result of your actions.59. Why should the we hire you as this position At LabCorp?This is the part where you link your skills, experience, education and your personality to the job itself. This is why you need to be utterly familiar with the job description as well as the company culture. Remember though, it's best to back them up with actual examples of say, how you are a good team player.60. What is your desired salary At LabCorp?Bad Answer: Candidates who are unable to answer the question, or give an answer that is far above market. Shows that they have not done research on the market rate, or have unreasonable expectations.Good answer: A number or range that falls within the market rate and matches their level of mastery of skills required to do the job.61. Why do you want to work At LabCorp for this organisation?Being unfamiliar with the organisation will spoil your chances with 75% of interviewers, according to one survey, so take this chance to show you have done your preparation and know the company inside and out. You will now have the chance to demonstrate that you've done your research, so reply mentioning all the positive things you have found out about the organisation and its sector etc. This means you'll have an enjoyable work environment and stability of employment etc – everything that brings out the best in you.62. Explain me about your experience working in this field At LabCorp?I am dedicated, hardworking and great team player for the common goal of the company I work with. I am fast learner and quickly adopt to fast pace and dynamic area. I am well organized, detail oriented and punctual person.63. What would your first 30, 60, or 90 days look like in this role At LabCorp?Start by explaining what you'd need to do to get ramped up. What information would you need? What parts of the company would you need to familiarize yourself with? What other employees would you want to sit down with? Next, choose a couple of areas where you think you can make meaningful contributions right away. (e.g., “I think a great starter project would be diving into your email marketing campaigns and setting up a tracking system for them.”) Sure, if you get the job, you (or your new employer) might decide there's a better starting place, but having an answer prepared will show the interviewer where you can add immediate impact-and that you're excited to get started.64. What do you think is your greatest weakness?Don't say anything that could eliminate you from consideration for the job. For instance, "I'm slow in adapting to change" is not a wise answer, since change is par for the course in most work environments. Avoid calling attention to any weakness that's one of the critical qualities the hiring manager is looking for. And don't try the old "I'm a workaholic," or "I'm a perfectionist.65. Tell me something about your family background?First, always feel proud while discussing about your family background. Just simple share the details with the things that how they influenced you to work in an airline field.66. Are you planning to continue your studies and training At LabCorp?If asked about plans for continued education, companies typically look for applicants to tie independent goals with the aims of the employer. Interviewers consistently want to see motivation to learn and improve. Continuing education shows such desires, especially when potentials display interests in academia potentially benefiting the company.Answering in terms of “I plan on continuing my studies in the technology field,” when offered a question from a technology firm makes sense. Tailor answers about continued studies specific to desired job fields. Show interest in the industry and a desire to work long-term in said industry. Keep answers short and to the point, avoiding diatribes causing candidates to appear insincere.67. Describe a typical work week for this position At LabCorp?Interviewers expect a candidate for employment to discuss what they do while they are working in detail. Before you answer, consider the position At LabCorp you are applying for and how your current or past positions relate to it. The more you can connect your past experience with the job opening, the more successful you will be at answering the questions.68. What type of work environment do you prefer?Ideally one that's similar to the environment of the company you're applying to. Be specific.69. How would you rate your communication and interpersonal skills for this job At LabCorp?These are important for support workers. But they differ from the communication skills of a CEO or a desktop support technician. Communication must be adapted to the special ways and needs of the clients. Workers must be able to not only understand and help their clients, but must project empathy and be a warm, humane presence in their lives.70. Do you have any questions for me?Good interview questions to ask interviewers at the end of the job interview include questions on the company growth or expansion, questions on personal development and training and questions on company values, staff retention and company achievements.Download Interview PDF 71. How would you motivate your team members to produce the best possible results?Trying to create competitive atmosphere, trying to motivate the team as a whole, organizing team building activities, building good relationships amongst people.72. How do you act when you encounter competition?This question is designed to see if you can rise the occasion. You want to discuss how you are the type to battle competition strongly and then you need to cite an example if possible of your past work experience where you were able to do so.73. What would you like to have accomplished by the end of your career?Think of 3 major achievements that you'd like to accomplish in your job when all is said and done - and think BIG. You want to show you expect to be a major contributor at the company. It could be creating a revolutionary new product, it could be implementing a new effective way of marketing, etc.74. What do you think we could do better or differently?This is a common one at startups. Hiring managers want to know that you not only have some background on the company, but that you're able to think critically about it and come to the table with new ideas. So, come with new ideas! What new features would you love to see? How could the company increase conversions? How could customer service be improved? You don't need to have the company's four-year strategy figured out, but do share your thoughts, and more importantly, show how your interests and expertise would lend themselves to the job.75. What features of your previous jobs have you disliked?It's easy to talk about what you liked about your job in an interview, but you need to be careful when responding to questions about the downsides of your last position. When you're asked at a job interview about what you didn't like about your previous job, try not to be too negative. You don't want the interviewer to think that you'll speak negatively about this job or the company should you eventually decide to move on after they have hired you.76. How would your friends describe you?My friends would probably say that I'm extremely persistent – I've never been afraid to keep going back until I get what I want. When I worked as a program developer, recruiting keynote speakers for a major tech conference, I got one rejection after another – this was just the nature of the job. But I really wanted the big players – so I wouldn't take no for an answer. I kept going back to them every time there was a new company on board, or some new value proposition. Eventually, many of them actually said "yes" – the program turned out to be so great that we doubled our attendees from the year before. A lot of people might have given up after the first rejection, but it's just not in my nature. If I know something is possible, I have to keep trying until I get it.77. Do you think you have enough experience At LabCorp?If you do not have the experience they need, you need to show the employer that you have the skills, qualities and knowledge that will make you equal to people with experience but not necessary the skills. It is also good to add how quick you can pick up the routine of a new job role.

Fri, 16 Jun 2023

HOW TO RESPOND TO BEHAVIORAL INTERVIEW QUESTIONS?

Fri, 16 Jun 2023

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HOW TO RESPOND TO BEHAVIORAL INTERVIEW QUESTIONS?

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