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Golang Questions Set 8:

Quiz Mode

Which keyword is used to implement an interface in Go?

type

struct

interface

implements

Solution:

What is the purpose of an empty interface in Go?

To define a generic type

To define a function type

To define a struct type

To define a pointer type

Solution:

What is the output of the following code?
package main
import "fmt"

func main() {
var x []int
fmt.Println(len(x))
}

<nil>

Compilation error

Runtime error

Solution:

What is the purpose of the "net.Conn" interface in Go?

To handle HTTP requests

To handle database queries

To handle network connections

To handle user authentication

Solution:

What will be the output of the following code?
package main
import "fmt"
func main() {
  var x [3]int = [3]int{1, 2, 3}
  y := x
  y[1] = 4
  fmt.Println(x[1], y[1])
}

1 4

2 4

3 4

2 2

Solution:

What is the purpose of the "sort.Interface" interface in Go?

To sort slices and arrays of values

To convert a value to a string representation

To handle user authentication

To handle file I/O operations

Solution:

What is the purpose of the "fmt.Stringer" interface in Go?

To format strings in a specific way

To convert a value to a string representation

To read and write data to a file or network connection

To handle HTTP requests

Solution:

Can a struct implement multiple interfaces in Go?

Yes, a struct can implement multiple interfaces

No, a struct can only implement one interface

It depends on the size of the struct

It depends on the number of methods in the interface

Solution:

What will be the output of the following program?
package main

import (
"fmt"
)

func main() {
var x interface{} = 5
var y interface{} = "Hello"
fmt.Println(x.(int) + y.(string))
}

5Hello

Compilation error

Runtime error

The program will not compile as interface{} types cannot be used in expressions

Solution:

Which of the following is not a valid way to implement an interface in Go?

Using a struct that defines all the methods in the interface

Using a pointer to a struct that defines all the methods in the interface

Using a type that defines all the methods in the interface

Using a function that defines all the methods in the interface

Solution:

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Golang Questions Set 8:

Which keyword is used to implement an interface in Go?

Solution:

What is the purpose of an empty interface in Go?

Solution:

What is the output of the following code?
package main
import "fmt"

func main() {
var x []int
fmt.Println(len(x))
}

Solution:

What is the purpose of the "net.Conn" interface in Go?

Solution:

What will be the output of the following code?
package main
import "fmt"
func main() {
  var x [3]int = [3]int{1, 2, 3}
  y := x
  y[1] = 4
  fmt.Println(x[1], y[1])
}

Solution:

What is the purpose of the "sort.Interface" interface in Go?

Solution:

What is the purpose of the "fmt.Stringer" interface in Go?

Solution:

Can a struct implement multiple interfaces in Go?

Solution:

What will be the output of the following program?
package main

import (
"fmt"
)

func main() {
var x interface{} = 5
var y interface{} = "Hello"
fmt.Println(x.(int) + y.(string))
}

Solution:

Which of the following is not a valid way to implement an interface in Go?

Solution:

Related Question Sets:

Related Topics:

Golang Questions Set 8:

Which keyword is used to implement an interface in Go?

Solution:

What is the purpose of an empty interface in Go?

Solution:

What is the output of the following code?package mainimport "fmt"func main() { var x []int fmt.Println(len(x))}

Solution:

What is the purpose of the "net.Conn" interface in Go?

Solution:

What will be the output of the following code?package mainimport "fmt"func main() { var x [3]int = [3]int{1, 2, 3} y := x y[1] = 4 fmt.Println(x[1], y[1])}

Solution:

What is the purpose of the "sort.Interface" interface in Go?

Solution:

What is the purpose of the "fmt.Stringer" interface in Go?

Solution:

Can a struct implement multiple interfaces in Go?

Solution:

What will be the output of the following program?package mainimport ( "fmt")func main() { var x interface{} = 5 var y interface{} = "Hello" fmt.Println(x.(int) + y.(string))}

Solution:

Which of the following is not a valid way to implement an interface in Go?

Solution:

Related Question Sets:

Related Topics:

What is the output of the following code?
package main
import "fmt"

func main() {
var x []int
fmt.Println(len(x))
}

What will be the output of the following code?
package main
import "fmt"
func main() {
var x [3]int = [3]int{1, 2, 3}
y := x
y[1] = 4
fmt.Println(x[1], y[1])
}

What will be the output of the following program?
package main

import (
"fmt"
)

func main() {
var x interface{} = 5
var y interface{} = "Hello"
fmt.Println(x.(int) + y.(string))
}