29 interview questions for developers (2026)

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control flow

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garbage collector

architecture

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29 interview questionsfor developers (2026)

Test your developer skills before an interview with 29 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

29 interview questionsfor developers (2026)

Test your developer skills before an interview with 29 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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

What is the equivalent of undefined in Go?

Iterate over a slice in Go

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

What is the default value of a variable in Go?

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

Accessing a private field in Go

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

How to use goroutines in Go

How to add an element to a slice in Go

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

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

Create a struct in Go

Which data type can store any value in Go?

How to define a function in Go

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

What bug will occur with the code below ? ```go ctx = context.WithValue(ctx, "userID", 42) // ... in another package: id, _ := ctx.Value("userID").(int) ```

The code below contains a flaw can you point towards it? ```Go func worker(id int, wg sync.WaitGroup) { defer wg.Done() println("worker", id) } func main() { var wg sync.WaitGroup for i := 0; i < 3; i++ { wg.Add(1) go worker(i, wg) } wg.Wait() } ```

What happens when this code is executed? ```Go func main() { var a chan int b := make(chan int, 1) select { case v := <-a: fmt.Println("a", v) case v := <-b: fmt.Println("b", v) } } ```