Question 1

What is Golang?

Accepted Answer

Golang or Go is a statically typed open-source programming language developed by Google engineers Robert Griesemer, Rob Pike, and Ken Thompson.  Golang or Go was designed to address the limitations of existing languages. Also, it offers a streamlined approach to building robust and efficient software.

Question 2

How to Become a Golang Developer?

Accepted Answer

Golang is one of the fastest-growing programming languages in recent years. As per the technology usage statistics, a large number of websites, that is, around 54,946 websites, use Golang for their web development needs. Impressively, Go is the most popular and widely used in the United States, where it has achieved significant traction.

Question 3

What opportunities does Golang development offer in 2024?

Accepted Answer

Golang is making its distinct mark in the digital technology landscape. Since its inception in 2007 by Google, Go has gathered widespread acclaim for its simplicity, efficiency, and strong performance. Go programming language enjoys continued success in 2024 with global businesses and developers actively embracing its latest trends.

Developers are using Golang to write WebAssembly code as it allows to run high-performance Go applications directly in web browsers.  Moreover, Go remains a top choice for cloud-native development, with its lightweight design and robust concurrency support. The Go community is actively enhancing the developer experience through the introduction of tools that simplify coding, testing, and debugging tasks. With Go 1.13, the language continues to evolve, contributing to improved dependency management and project stability. The language is also venturing into quantum computing, edge computing, and IoT spaces, showcasing its versatility and efficiency. Furthermore, a heightened focus on security practices and tools is expected in the Go ecosystem for 2024. Whether you are a seasoned Go developer or a newcomer, staying abreast of these Golang trends positions you on the cutting edge of this vibrant programming language, poised to explore its limitless possibilities in 2024 and beyond.

Question 4

How to get Golang Developer Jobs?

Accepted Answer

Golang developers are in high demand today. Many top companies are looking to hire experienced Golang developers who can offer innovative solutions to their software needs. So, if you are a seasoned Golang developer looking to work with top global companies, then sign up with Olibr, get vetted on your superior communication and technical skills, and apply for top jobs in the market!

Question 5

What are Golang packages?

Accepted Answer

Go packages are essential for organizing, reusing, and maintaining code. A Go Package is a unit used to structure and manage code. It provides a way to group related functions, types, and variables together. A package can contain one or more Go source files (with the .go extension) that reside in the same directory. The package is declared at the top of the Go source file as package . To import the packages to the source file use import . fmt is a standard Go Package with formatting and printing functionalities such as Println().

Question 6

What is goroutine in Golang?

Accepted Answer

A goroutine is a lightweight, independently executing thread of execution. Goroutine in Golang is a function or method that runs concurrently with other functions or methods. Goroutines are managed by the Go runtime and every Go program has at least one goroutine, known as the main goroutine.   
To create a goroutine, use the go keyword followed by a function call. For example:

func myFunction() {

// Your code here

}

go myFunction() // Creates a new goroutine

Question 7

Is it possible to return multiple values from a function in Go?

Accepted Answer

In Go, you can return multiple values from a function. This feature is quite useful for various scenarios. It is used to return error codes along with additional information (e.g., an error message). By sending comma-separated values with the return statement and by assigning it to multiple variables in a single statement you can return multiple values in Golang.   
Example:

package main

import "fmt"

func calculate(a, b int) (int, int) {

sum := a + b

product := a * b

return sum, product

}

func main() {

x, y := 10, 5

sumResult, productResult := calculate(x, y)

fmt.Printf("Sum: %d
Product: %d
", sumResult, productResult)

}

Question 8

Can you format a string without printing?

Accepted Answer

The Sprintf command helps you format a string without printing.

return fmt.Sprintf ("Size: %d MB.", 50)

Question 9

Can we use Global Variables in programs implementing goroutines?

Accepted Answer

The usage of global variables in programs implementing goroutines is not recommended due to potential issues related to concurrency and shared state. Since global variables can be accessed and modified by multiple goroutines concurrently, it can lead to unexpected and arbitrary results.

Question 10

How is GoPATH different from GoROOT variables in Go?

Accepted Answer

GOPATH specifies the root directory of your Go workspace whereas GOROOT specifies the location of your Go installation directory. GoPATH is an environment variable used to symbolize the directories out of $GoROOT, which combines the source and the binaries of Go Projects. The GoROOT variable determines where the Go SDK is located. The variable should be modified only when we plan to use multiple Go versions. The GoPATH determines the root of the workspace whereas the GoROOT determines the location of Go SDK.

Question 11

Which is safer for concurrent data access? Channels or Maps?

Accepted Answer

When it comes to concurrent data access, channels are safer than maps in Go. Maps are not safe for concurrent use because reading and writing to them simultaneously can lead to undefined behavior and data races.

Question 12

How can you sort a slice of custom structs with the help of an example?

Accepted Answer

Sorting a slice of custom structs in Go can be done using the sort package. Suppose we have a custom struct called Person with fields Name and Age. We want to sort a slice of Person objects based on their age. Here’s how you can achieve that:   
  
package main

import (

"fmt"

"sort"

)

type Person struct {

Name string

Age  int

}

func main() {

people := []Person{

{"Alice", 30},

{"Bob", 25},

{"Eve", 35},

{"David", 28},

}

// Sort the slice of Person structs by age using the sort package

sort.Slice(people, func(i, j int) bool {

return people[i].Age

Question 13

What do you understand by variadic functions in Go?

Accepted Answer

A function with a parameter that is preceded with a set of ellipses ( ... ) is a variadic function. The ellipsis indicate that the parameter provided can be zero, one, or more values. Variadic functions in Go allow a function to accept a variable number of arguments. They’re particularly useful when the number of inputs may vary. For example, fmt.Printf is a variadic function that needs one fixed argument as the first parameter, and it can accept any arguments. Variadic functions are used for string formatting. You cannot specify variadic parameter as a return value, but you can return the variable of type slice from the function. Consider this example where we have a variadic function called joinstring that takes a variable number of arguments of a type string.   
  
func function_name(arg1, arg2...type)type{  
// Some statements  
} 
package main 
import( 
    "fmt" 
    "strings" 
) 
// Variadic function to join strings and separate them with hyphen 
func joinstring(element...string)string{ 
    return strings.Join(element, "-") 
} 
func main() { 
  // To demonstrate zero argument 
   fmt.Println(joinstring()) 
   // To demonstrate multiple arguments 
   fmt.Println(joinstring("Olibr", "FAQs")) 
   fmt.Println(joinstring("Golang", "Interview", "Questions")) 
} 
 The output of this code is: 
Olibr-FAQs 
Golang-Interview-Questions

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