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20 interview questionsfor developers (2026)

Test your developer skills before an interview with 20 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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20 questions
Easy
5 votes430 runs0 comment

Write a Go program that prints 1 if test is true, and 0 otherwise.

Back-end developer
if else
variables
Communauté W3Dat Nov 29, 2021
Easy
1 vote417 runs0 comment

Iterate over a slice in Go

Back-end developer
range
slice
Communauté W3Dat Nov 29, 2021
Easy
1 vote407 runs0 comment

What is the equivalent of undefined in Go?

Back-end developer
nil
Communauté W3Dat Nov 29, 2021
Medium
1 vote20 runs
1 comment

Type assertion in Go: what happens when asserting an incorrect type?

Back-end developer
type assertion
interface
Anonymous authorat Feb 24, 2026
Easy
0 vote439 runs0 comment

Write a Go program that prints the string "Hello World" to the console.

Back-end developer
strings
Communauté W3Dat Jan 30, 2023
Easy
0 vote435 runs0 comment

What is the default value of a variable in Go?

Back-end developer
interfaces
Communauté W3Dat Nov 29, 2021
Easy
0 vote425 runs0 comment

What are the two files that are created when you run go mod init?

Back-end developer
go.mod
go.sum
Communauté W3Dat Nov 29, 2021
Easy
0 vote424 runs0 comment

Accessing a private field in Go

Back-end developer
structs
private
public
Communauté W3Dat Nov 29, 2021
Easy
0 vote422 runs0 comment

Write a Go program that prints the numbers from 1 to 10

Back-end developer
loops
control flow
Communauté W3Dat Nov 29, 2021
Easy
0 vote416 runs0 comment

How to use goroutines in Go

Back-end developer
goroutines
Communauté W3Dat Nov 29, 2021
Easy
0 vote415 runs0 comment

How to add an element to a slice in Go

Back-end developer
slice
append
Communauté W3Dat Nov 29, 2021
Medium
0 vote409 runs0 comment

Write a Go program that prints the following lines to the console: line 1, line 2, line 3, line 4

Back-end developer
error
pointers
Communauté W3Dat Nov 29, 2021
Medium
0 vote408 runs0 comment

Go is a statically typed, compiled language designed at Google that makes it easy to build simple, reliable, and efficient software.

Back-end developer
garbage collector
architecture
Communauté W3Dat Nov 29, 2021
Easy
0 vote408 runs0 comment

What is the type of the first character of a string in Go?

Back-end developer
types
errors
Communauté W3Dat Nov 29, 2021
Easy
0 vote407 runs0 comment

Create a struct in Go

Back-end developer
struct
method
Communauté W3Dat Nov 29, 2021
Medium
0 vote299 runs0 comment

Which data type can store any value in Go?

Back-end developer
data types
interface
Nick LAM YEE MANat Dec 22, 2022
Easy
0 vote115 runs0 comment

Return a string with the word 'Hello' and the name of the person passed as an argument.

Back-end developer
strings
fmt
Emmanuel Jametat Dec 26, 2024
Easy
0 vote70 runs
1 comment

How to handle errors in Go

Back-end developer
error
panic
Cédricat Jul 7, 2025
Medium
0 vote38 runs0 comment

How to define a function in Go

Back-end developer
functions
declaration
Anonymous authorat Jan 6, 2026
Easy
0 vote20 runs0 comment

Declare a variable of type int64 and containing the value 42 in Go

Back-end developer
variables
types
Marc Malhaat Feb 24, 2026