What is Go - Practice Questions & Exercises

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Go program?

Look at this Go code. What will it print when run?

Go

package main
import "fmt"
func main() {
    fmt.Println("Hello, Go!")
}

A Hello, Go!

B hello, go!

C Hello Go!

D Compilation error

💡 Hint

Check the exact string inside the quotes and capitalization.

The program prints exactly what is inside the quotes with correct capitalization.

🧠 Conceptual

intermediate

What is Go mainly used for?

Choose the best description of what Go is mainly used for.

A A markup language for web pages

B A tool for designing websites with drag and drop

C A database management system

D A language for building fast and reliable server software

💡 Hint

Think about what kind of programs Go is famous for.

Go is designed for building fast, reliable server and network programs.

❓ Predict Output

advanced

What does this Go code print?

What is the output of this Go program?

Go

package main
import "fmt"
func main() {
    var x int = 5
    var y int = 10
    fmt.Println(x + y)
}

A Compilation error

B 15

C 5 + 10

D 510

💡 Hint

Look at the variables and the operator used.

The program adds two integers and prints the sum.

❓ Predict Output

advanced

What error does this Go code cause?

What error will this Go code produce when compiled?

Go

package main
func main() {
    var a int = "hello"
}

A missing return statement

B undefined: a

C cannot use "hello" (type string) as type int in assignment

D no error

💡 Hint

Check the type of the variable and the value assigned.

You cannot assign a string to an int variable in Go.

🧠 Conceptual

expert

Which feature is unique to Go compared to many other languages?

Choose the feature that Go has which is not common in many other programming languages.

A Built-in support for concurrent programming with goroutines

B Automatic memory management with garbage collection

C Object-oriented programming with classes and inheritance

D Dynamic typing for variables

💡 Hint

Think about how Go handles multiple tasks at the same time.

Go has goroutines, lightweight threads, built into the language for easy concurrency.