kotlin mcq(multiple choice) question with answers

Kotlin is a programming language developed by JetBrains, the company behind IntelliJ IDEA, a popular Java IDE. Kotlin is fully compatible with Java and is designed to improve upon some of the shortcomings of Java. It is a statically typed language that is concise, expressive, and safe. Kotlin is more expressive than Java, which means that it requires fewer lines of code to accomplish the same tasks. It also has built-in null safety features, which help prevent null pointer exceptions. Additionally, Kotlin can be used for both Android and server-side development. It is officially supported by Google as a first-class language for Android development.

1. What is the keyword used to define a class in Kotlin?

class

struct

object

type

2. Which of the following is not a valid way to create an object in Kotlin?

Using the keyword "new"

Using the keyword "object"

Using the keyword "instance"

Using the keyword "val"

3. What is the purpose of the "constructor" in Kotlin?

To define the properties of an object

To initialize the properties of an object

To define the methods of an object

To define the class of an object

4. What is the syntax for calling a method in Kotlin?

object.method()

object.function()

object.procedure()

object.call()

5. What is the keyword used to define a singleton class in Kotlin?

singleton

object

static

final

6. What is the difference between a property and a field in Kotlin?

A property has a getter and setter, while a field does not

A property is a variable, while a field is a constant

A property is a constant, while a field is a variable

A property is a method, while a field is a variable

7. What is the purpose of the "override" keyword in Kotlin?

To define a property or field

To define a method in a subclass

To define a constructor in a subclass

To define a class in a subclass

8. What is the difference between a "companion object" and a regular object in Kotlin?

A companion object is a singleton object, while a regular object is not

A companion object is defined inside a class, while a regular object is not

A companion object has access to the private members of a class, while a regular object does not

All of the above

9. What is the keyword used to define an interface in Kotlin?

abstract

class

object

interface

10. What is the syntax for creating a subclass in Kotlin?

class Subclass: Superclass

class Subclass extends Superclass

class Subclass inherits Superclass

class Subclass implements Superclass

11. How do you define a property in Kotlin that can only be accessed within the same class?

Using the keyword "internal"

Using the keyword "protected"

Using the keyword "private"

Using the keyword "local"

12. What is the keyword used to define a sealed class in Kotlin?

final

sealed

closed

restricted

13. What is the keyword used to define an extension function in Kotlin?

extend

fun

operator

infix

14. What is the keyword used to define a type alias in Kotlin?

alias

typedef

define

type

15. What is the difference between a "var" and a "val" in Kotlin?

"var" is a mutable variable, while "val" is an immutable variable

"var" is a constant, while "val" is a variable

"val" is a mutable variable, while "var" is an immutable variable

"val" is a constant, while "var" is a variable

16. What is the keyword used to define a companion object in Kotlin?

object

class

companion

static

17. What is the purpose of the "object" keyword in Kotlin?

To define a singleton object

To define a static class

To define a non-static class

To define an interface

18. What is the keyword used to define a constructor in Kotlin?

constructor

new

create

init

19. What is the keyword used to define a destructor in Kotlin?

destructor

dispose

finalize

destroy

20. What is a nested class in Kotlin?

A class that is defined within another class

A class that is defined within a function

A class that is defined within a package

A class that is defined outside of any other class or function

kotlin mcq(multiple choice) question with answers

kotlin MCQ (Multiple Choice Question) with answers