Golang Interview Questions

by Diksha Sharma 14-Oct-19

0 280


Hello and welcome back to my today's blog on updated Golang Programming Interview Questions for 2020

While having a sip of my coffee, it just popped up in my mind to prepare this blog as I found it is difficult to go to all the sites to search for the best interview questions for Golang.

I have gone through many sites and interacted with the people from same field and came to the conclusion by preparing the collection of top 15 most asked questions by the interviewers these days.

Golang Interview Questions

Don't stress too much by thinking where to start your preparation from. Simple is just walking through this exclusive list of questions or else it would be a time consuming task to search for the interview questions.

Also I have tried to use very simple and basic language so that you can easily understand the answers.

Let's get started!

1) What is GO programming?

GO is an open-source programming language which is used to develop simple and reliable software. The software in GO are built from the packages which leads to efficient dependency management attribute of the language.


2) What are packages in GO programming?

The Go programming languages run with the help of packages. The code written in Go are run in the program main package with the import paths as "fmt" and "math/rand".


3) Is Go a case-sensitive programming language?

Yes, GO is a case-sensitive language.


4) What are the advantages of using GO language?

Various advantages of using GO languages are:

i) It is a fast programming language which complies very quickly

ii) Garbage collection is included in GO programming

iii) Concurrency at the language level is also supported in GO

iv) Maps and Strings are built into the program

v) CSP-style concurrent features and various safety measures are included in the programming language

vi) The first class objects in Go are the functions.


5) What do you mean by workspace in GO?

Workspace is a directory hierarchy which is used to store the code for GO programming languages.

The three directories in the root of GO workspace are:

i) src containing the source code files organized into packages

ii) pkg containing the package objects

iii) bin containing the commands to be executed


6) How is testing performed in GO?

Testing in Go programming language can be done with the help of testing framework which consist of go test command and testing packages.

You just have to save the file with the _testing as ending of the filename.


7) What are string literals?

String literals refer to the strings which are obtained by concatenating a sequence of characters. In GO, there are two main types of string literals:

i) Interpreted String Literal which consist of text as the value inside double quotes (" ") without a new line.

ii) Raw String Literal which consist of character sequences as the value inside the back quote (") without any interruption.


8) What are Go Interfaces?

GO interfaces are specified as a set of methods or type and are used to specify the behavior of the objects.

The correct way to create a GO interface is to use the "type" word followed by the keyword and name interface.


The book which I personally suggest you to read is given below, which will help you enhance your knowledge base and skillsets.


9) Can we format strings in Go without printing them?

Yes, we can format strings in GO without printing them using the following command:

return fmt.Sprintf ( "at %v, %s" , e.When , e.What )


10) What is GOPATH Environment Variable?

GOPATH environment variable is used in GO to specify the exact location of the workspace. The environment variable must be set before writing any code in GO programming.


11) Write a program to swap integers in GO.

The program below swaps integers 1, 2,3,4,5:

func reverse(s []int) {
    for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
     s[i], s[j] = s[j], s[i]
  }
}
func main() {
  a := []int{1, 2, 3, 4, 5}
  reverse(a)
  fmt.Println(a)	
}

On running the code, the output will be:

Golang Interview Questions


12) How can you compare constructs in GO programming? Explain with a code.

We can compare the constructs in Go programming with the help of ==, unless the constructs are of varying types and do not contain map, slices or functions.

For example, see the below code:

import (
 "fmt"
)
func main() {
 a := 33
 b := 33
 if a == b {
  fmt.Println("a is equal to b")
 }
}

As 33==33, the output will be:

Golang Interview Questions


13) What is go-routine in GO? Can we stop them?

Go-routine in Go programming is a function which runs along with other functions. Yes, we can stop go-routine with the use of signal channel which pushes a certain value, detecting it to stop executing.

When the function detects the signal, it halts.


14) How are Hash displayed in a sorted order using GO?

The hash values can be sorted in Go programming with the help of key values and sort function.

For example, look at the following example which sorts the values as per the keys:

import (
 "fmt"
 "sort"
)
func main() {
veggie := map[string]int{
  "Tomato": 500,
  "Onion":  600,
  "Potato": 700,
}

var keys []string
for key := range veggie {
   keys = append(keys, key)
}
sort.Strings(keys)

for _, key := range keys {
  fmt.Printf("%s:%v\n", key, veggie[key])
}
}

On executing the program, the output will be:

Golang Interview Questions


15) How can we generate multiple strings in GO?

Multiple strings in GO can be written with the help of raw string literal inside back quotes.

For example:

'string 1

String 2

String 3'


Conclusion:

That was all in terms of Golang programming language. In a nutshell, it is not a difficult task to crack the Golang interview in 2020 until or unless you prepare well. So let's get a head start to your dream career with me.

I hope I am successful in reducing your burden of searching multiple sites for Golang programming interview questions. 

Also share with me your personal experience in the comment box below if you have faced Golang Interview.

At last keep connected for more updates on interview questions and keep sharing my blogs with your peers.


Share:


Comments

    Waiting for your comments

Leave a Reply