30 Go Quiz Questions and Answers

Go, also known as Golang, is a statically-typed, compiled programming language developed by Google. It was designed by Robert Griesemer, Rob Pike, and Ken Thompson and was first released in 2009. Go is designed to be simple, efficient, and productive, making it popular for building scalable and high-performance applications. Here is an overview of Go and its key features:

Concurrency Support: Go has built-in support for concurrency through goroutines and channels. Goroutines are lightweight threads that allow developers to write concurrent programs easily. Channels facilitate communication and synchronization between goroutines.

Efficiency: Go is designed for efficiency and performance. It has a fast compiler that produces optimized machine code, resulting in faster execution times.

Simplicity: Go has a clean and simple syntax, making it easy to learn and read. The language avoids unnecessary complexity and boilerplate, enabling developers to write code quickly and efficiently.

Garbage Collection: Go includes automatic garbage collection, which manages memory allocation and deallocation. This feature relieves developers from the burden of manual memory management.

Article outline

• Part 1: 30 Go quiz questions & answers
• Part 2: Download Go questions & answers for free
• Part 3: Free online quiz creator – OnlineExamMaker

Part 1: 30 Go quiz questions & answers

1. What is the primary goal of the Go programming language?
a) Maximum performance
b) Simplicity and efficiency
c) Object-oriented programming
d) Dynamic typing
Answer: b) Simplicity and efficiency

2. Go was developed by which company?
a) Apple
b) Microsoft
c) Google
d) Amazon
Answer: c) Google

3. Which of the following is NOT a key feature of Go?
a) Garbage collection
b) Concurrency support through goroutines
c) Dynamic typing
d) Cross-platform support
Answer: c) Dynamic typing

4. Go uses which mechanism for handling errors?
a) Try-catch blocks
b) Exceptions
c) Error codes
d) Multiple return values with error type
Answer: d) Multiple return values with error type

5. What is the command to run a Go program?
a) go run program.go
b) run program.go
c) execute program.go
d) start program.go
Answer: a) go run program.go

6. How do you declare a variable in Go?
a) var x = 10
b) let x = 10
c) x := 10
d) int x = 10
Answer: c) x := 10

7. Which operator is used for pointer dereferencing in Go?
a) &
b) ->
c) *
d) ::
Answer: c) *

8. What does the “defer” keyword do in Go?
a) Defers the execution of a function until the end of the program
b) Defers the execution of a function until all surrounding functions are done executing
c) Defers the execution of a function indefinitely
d) Defers the declaration of a function until it is needed
Answer: b) Defers the execution of a function until all surrounding functions are done executing

9. How do you create a new goroutine in Go?
a) go start functionName()
b) start functionName()
c) goroutine functionName()
d) go functionName()
Answer: d) go functionName()

10. What is the purpose of the “make” function in Go?
a) To allocate memory for a new variable
b) To create a new goroutine
c) To initialize a map, slice, or channel
d) To create a new function
Answer: c) To initialize a map, slice, or channel

11. Which keyword is used to define a new struct type in Go?
a) struct
b) type
c) def
d) var
Answer: b) type

12. In Go, how do you import a package from the standard library?
a) package “fmt”
b) use “fmt”
c) import “fmt”
d) include “fmt”
Answer: c) import “fmt”

13. What is the correct way to access the second element of a slice named “mySlice” in Go?
a) mySlice[2]
b) mySlice(2)
c) mySlice{2}
d) mySlice[1]
Answer: d) mySlice[1]

14. How do you create a new map in Go?
a) new map[]
b) map{}
c) map[string]int{}
d) create map[string]int
Answer: c) map[string]int{}

15. What is the purpose of the “range” keyword in Go?
a) To specify a range of values for a loop
b) To iterate over elements in a slice, array, map, or channel
c) To define a function with multiple return values
d) To specify a range of numbers for arithmetic operations
Answer: b) To iterate over elements in a slice, array, map, or channel

Part 2: Download Go questions & answers for free

16. How do you define a constant in Go?
a) const PI = 3.14
b) constant PI = 3.14
c) let PI = 3.14
d) const let PI = 3.14
Answer: a) const PI = 3.14

17. Which package is used for formatted I/O in Go?
a) io
b) fmt
c) os
d) ioutil
Answer: b) fmt

18. In Go, how do you define a new interface?
a) new interface {}
b) interface {}
c) def interface {}
d) type interface {}
Answer: b) interface {}

19. What is the output of the following code snippet?
“`go
package main

import “fmt”

func main() {
x := 5
if x > 0 {
fmt.Println(“x is positive”)
} else if x == 0 {
fmt.Println(“x is zero”)
} else {
fmt.Println(“x is negative”)
}
}
“`
a) x is positive
b) x is zero
c) x is negative
d) The code will not compile due to an error.
Answer: a) x is positive

20. In Go, what is the purpose of the “select” statement?
a) To select a value from a list of options
b) To specify which variable to use in a switch statement
c) To select a case in a switch statement based on a condition
d) To wait for data from multiple channels
Answer: d) To wait for data from multiple channels

21. How do you remove an element from a slice in Go?
a) slice.remove(index)
b) slice.delete(index)
c) slice[index] = nil
d) Use append to create a new slice without the element
Answer: d) Use append to create a new slice without the element

22. What is the purpose of the “defer” statement when used with a function that returns a value?
a) To delay the execution of the function until later in the program
b) To ensure that the function is executed even if there is a panic
c) To change the return value of the function
d) To prevent the function from returning a value
Answer: b) To ensure that the function is executed even if there is a panic

23. How do you convert a variable of type “string” to “int” in Go?
a) intVar := int(stringVar)
b) intVar := strconv.Atoi(stringVar)
c) intVar := stringVar.ToInt()
d) intVar := convertToInt(stringVar)
Answer: b) intVar := strconv.Atoi(stringVar)

24. In Go, what is the correct way to define a function that takes two integers as arguments and returns their sum?
a) func sum int a, int b { return a + b }
b) function sum(a int, b int) { return a + b }
c) func sum(a int, b int) int { return a + b }
d) func sum(a, b int) { return a + b }
Answer: c) func sum(a int, b int) int { return a + b }

25. How do you initialize a pointer to an integer variable in Go?
a) var p *int = &x
b) p := *int(x)
c) p := &x
d) var p *int = x
Answer: c) p := &x

26. What is the output of the following code snippet?
“`go
package main

import “fmt”

func main() {
numbers := []int{1, 2, 3, 4, 5}
for _, num := range numbers {
fmt.Print(num, ” “)
}
}
“`
a) 1 2 3 4 5
b) 5 4 3 2 1
c) The code will not compile due to an error.
d) The output cannot be determined.
Answer: a) 1 2 3 4 5

27. What is the output of the following code snippet?
“`go
package main

import “fmt”

func main() {
x := 10
if x > 5 {
x := 5
fmt.Println(x)
}
fmt.Println(x)
}
“`
a) 5 10
b) 10 5
c) 5 5
d) 10 10
Answer: a) 5 10

28. What is the purpose of the “break” statement in Go?
a) To exit a loop prematurely
b) To skip the rest of the code in a switch statement
c) To terminate a goroutine
d) To remove an element from a slice
Answer: a) To exit a loop prematurely

29. Which of the following is NOT a valid way to declare an array in Go?
a) var arr [5]int
b) arr := [5]int{1, 2, 3, 4, 5}
c) arr := []int{1, 2, 3, 4, 5}
d) arr := [5]int{}
Answer: c) arr := []int{1, 2, 3, 4, 5}

30. What is the purpose of the “range” keyword when used with channels in Go?
a) To specify a range of values that the channel can handle
b) To iterate over elements in the channel
c) To close the channel after a specific range of values
d) To ensure that a specific range of values is buffered in the channel
Answer: b) To iterate over elements in the channel

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