Innovative Kotlin Test - 78+ MCQs: Kotlin test: Evaluate Your Programming Skills with Kotlin Questions and Answers

1. How does Kotlin handle multiple inheritance?

By allowing a class to inherit from multiple classes

By using interfaces to achieve multiple inheritance

Kotlin does not support multiple inheritance

By using the 'multiinherit' keyword

2. What is the purpose of the 'sealed class' in Kotlin?

To restrict the inheritance of a class hierarchy

To declare a class with restricted access modifiers

To define a class with a limited number of instances

To create a class with private constructors

3. How does Kotlin handle extension properties?

Kotlin does not support extension properties

By using the 'extension' keyword

By declaring them in a separate extension file

By using the 'property' keyword

4. What is the purpose of the 'by lazy' keyword in Kotlin?

To specify lazy loading for classes

To create a lazy property that is computed the first time it is accessed

To declare external declarations for platform-specific code

To define the priority of operators

5. How do you define an extension function in Kotlin?

fun String.extendFunction() {}

String fun extendFunction() {}

extend fun String.extendFunction() {}

fun extendFunction() String {}

6. How do you declare a package in Kotlin?

package com.example.myPackage

com.example.myPackage

declare package com.example.myPackage

package: com.example.myPackage

7. What is the purpose of the 'let' function in Kotlin?

To define a lambda expression

To create an extension function

To apply a function to the result of a nullable expression

To handle program initialization

8. What is the purpose of the 'tailrec' modifier in Kotlin?

To define a recursive function

To mark the last element of a collection

To specify the tail of a class

To optimize tail-recursive functions

9. How do you declare an array in Kotlin?

val myArray = array()

array myArray[]

val myArray = Array()

val myArray = arrayOf()

10. What is the purpose of the 'operator' keyword in Kotlin?

To define mathematical operations for a class

To declare the priority of operators

To mark a class as an operator

To create conditional expressions

11. What is the purpose of the 'reified' keyword in Kotlin?

To enforce immutability for a variable

To specify a type parameter at runtime

To create a recursive function

To mark a class as reusable

12. What is the purpose of the 'if' expression in Kotlin?

To create loops

To define conditional statements

To handle exceptions

To declare variables

13. What is the purpose of the 'with' function in Kotlin?

To create a new instance of a class

To apply a function to each element of a collection

To define a scope for multiple function calls on the same object

To handle program termination

14. What is the purpose of the 'break' statement in Kotlin?

To end the program execution

To exit the current loop or when statement

To skip the next iteration of a loop

To return a value from a function

15. What is the purpose of the 'flatMap' function in Kotlin?

To apply a function to each element of a collection

To flatten a collection of collections

To create a new collection with transformed elements

To handle program initialization

16. What is the purpose of the 'use' function in Kotlin?

To utilize external libraries

To handle program initialization

To manage resource cleanup for AutoCloseable resources

To define a scope for exception handling

17. What is the purpose of the 'inline' modifier in Kotlin?

To prevent inlining of a function

To mark a function as non-nullable

To create an inline function

To enforce immutability for a variable

18. How do you define a class with a private constructor in Kotlin?

class MyClass { private constructor() }

class MyClass(private constructor()) {}

class MyClass private constructor() {}

class MyClass(private constructor) {}

19. How do you declare a top-level function in Kotlin?

function myFunction() {}

fun myFunction() {}

top fun myFunction() {}

fun: myFunction() {}

20. In Kotlin, what is the purpose of the 'step' parameter in a range?

To define the range size

To specify the range increment

To determine the range start

To calculate the range average

Kotlin MCQ Test 4