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A list of top frequently asked Go Programming interview questions and answers are given below.
GO is an open source programming language developed at Google. It is also known as Golang. This language is designed primarily for system programming.
Because Go is an open source programming language so, it is very easy to build simple, reliable and efficient software.
Go programming language is designed by Robert Griesemer, Rob Pike, and Ken Thompson. It is developed at Google Inc. in 2009.
Go programs are made up of packages. The program starts running in package main. This program is using the packages with import paths "fmt" and "math/rand".
Go programming language doesn't provide support for generic programming.
Yes! Go is a case sensitive programming language.
A string literals specifies a string constant that is obtained from concatenating a sequence of characters.
There are two types of string literals:
A workspace contains Go code. A workspace is a directory hierarchy with three directories at its root.
"false" is the default value of type "bool".
The GOPATH environment variable specifies the location of the workspace. You must have to set this environment variable while developing Go code.
Advantages/ Benefits of Go programming language:
A list of built-in supports in Go:
A goroutine is a function which usually runs concurrently with other functions. If you want to stop goroutine, you pass a signal channel to the goroutine, that signal channel pushes a value into when you want the goroutine to stop.
The goroutine polls that channel regularly as soon as it detects a signal, it quits.
To write multiple strings in Go, you should use a raw string literal, where the string is delimited by back quotes.
For example:
The break statement is used to terminate the for loop or switch statement and transfer execution to the statement immediately following the for loop or switch.
The continue statement facilitates the loop to skip the remainder of its body and immediately retest its condition prior to reiterating.
The goto statement is used to transfer control to the labeled statement.
The syntax of a for loop in Go programming language is:
Syntax to create a function in Go:
Static type variable declaration is used to provide assurance to the compiler that there is one variable in the given type and name so that there is no need for compiler to know complete detail about the variable for further processing. A variable declaration has its meaning at the time of compilation only, compiler needs actual variable declaration at the time of linking of the program.
A dynamic type variable declaration needs a compiler to interpret the type of variable according to the value passed to it. Compilers don't need a variable to have type statically as a necessary requirement.
You have to use the following code to print the type of a variable:
A pointer is used to hold the address of a variable.
For example:
Here x can be accessed by *p.
In Go, a pointer is represented by using the *(asterisk) character followed by the type of the stored value.
Yes. A short variable declaration := can be used only inside a function.
You should the following command to format a string without printing:
return fmt.Sprintf ("at %v, %s" , e.When , e.What )
The GO programming language syntax is specified using Extended Backus-Naur Form (EBNF):
Go programming language doesn't provide support for type inheritance.
Go programming language doesn't provide support for operator overloading.
Go programming language doesn't provide support for method overloading.
Go programming language doesn't provide support for pointer arithmetic.
Ans:
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In GO, interfaces is a way to identify the behavior of an object. An interface is created by using the "type" word, followed by a name and the keyword interface. An interface is specified as two things.
A type assertion takes an interface value and retrieves from it a value of the specified explicit type.
Type conversion is used to convert dissimilar types in GO.
In Go programming language there are several different types of functions called methods. In method declaration syntax, a "receiver" is used to to represent the container of the function. This receiver can be used to call function using "." operator.
The default value of a local variable is as its corresponding 0 value.
The default value of a local variable is as its corresponding 0 value.
In Go programming language, the pointer is initialized to nil.
In Go programming language, there is a special type of switch dedicated to check variable type at runtime. This switch is referred as type switch.
Global variables are not recommended because they may get accessed by multiple go routines (threads) concurrently and this can easily lead to an unexpected behavior causing arbitrary results.
Modular programming is a way to divide the program in to sub programs (modules / function) to achieve maximum efficiency.
More generic functions definition facilitates you to re-use the functions, such as built-in library functions.
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