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

1. In Kotlin, what is the purpose of the 'repeat' function?

To create repeated sequences

To define a recursive function

To repeat the execution of a loop

Kotlin does not have a 'repeat' function

2. 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

3. 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

4. What is the purpose of the 'trim' function in Kotlin?

To trim leading and trailing whitespace

To resize a collection

To remove null values from a collection

To handle program termination

5. What is the purpose of the 'reduce' function in Kotlin?

To reduce the size of a collection

To combine elements of a collection into a single result

To apply a function to each element of a collection

To remove null values from a collection

6. What is the purpose of the 'first' function in Kotlin?

To specify the first element of a collection

To apply a function to the first element of a collection

To retrieve the first element that matches a predicate

To create a new collection with the first element

7. How does Kotlin handle default arguments in functions?

By using the 'default' keyword

By declaring functions with an empty body

By specifying default values for parameters

Kotlin does not support default arguments

8. In Kotlin, what is the 'operator overloading' feature used for?

To overload the '+' operator for custom classes

To define the priority of operators

To mark a class as an operator

To handle program initialization

9. How do you declare an interface in Kotlin?

interface MyInterface {}

MyInterface {}

class MyInterface {}

MyInterface : class {}

10. How do you declare a constant property in a class in Kotlin?

const val myProperty = 10

val constant myProperty = 10

property val myProperty = 10

val myProperty: Constant = 10

11. Which keyword is used for type casting in Kotlin?

cast

convert

12. How do you declare a nullable variable in Kotlin?

var x: Int = null

var x: Int? = null

val x: Int? = 0

val x: Int = null

13. In Kotlin, what is the purpose of the 'also' function?

To apply a function to each element of a collection

To handle program initialization

To define a scope for the current object

To perform additional operations on an object and return it

14. What is the purpose of the 'apply' function in Kotlin?

To apply mathematical operations

To apply functions to each element of a collection

To configure the properties of an object during its creation

To handle program initialization

15. What is the 'when' expression used for in Kotlin?

To define switch-case statements

To create conditional expressions

To handle exceptions

To iterate over collections

16. What is the purpose of the 'noinline' modifier in Kotlin?

To prevent inlining of a function

To mark a function as non-nullable

To enforce immutability for a variable

To specify the return type of a function

17. How does Kotlin handle primary constructors in a class?

By allowing only one primary constructor

By requiring explicit declaration and initialization

By allowing implicit declaration and initialization

Kotlin does not support primary constructors

18. What is the syntax for a multiline string in Kotlin?

`This is a multiline string`

'This is a multiline string'

"This is a multiline string"

'''This is a multiline string'''

19. In Kotlin, what is the purpose of the 'init' block?

To initialize global variables

To execute code before program execution begins

To handle program termination

To initialize properties of a class

20. 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

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

function myFunction() {}

fun myFunction() {}

top fun myFunction() {}

fun: myFunction() {}

22. In Kotlin, what is the 'typealias' keyword used for?

To define a type alias for a class

To specify the data type of a variable

To create a shortcut for a longer type

To declare a type with aliasing behavior

23. 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

24. In Kotlin, what is the purpose of the 'inline' modifier for functions?

To specify that a function should be inlined during compilation

To declare a function as internal

To define a function with default parameters

To enforce immutability for a function

25. What is the purpose of the 'expect' keyword in Kotlin?

To define expected behavior for a function

To specify the return type of a function

To declare external declarations for platform-specific code

To create conditional expressions

26. What is a primary constructor in Kotlin?

The main constructor of a class declared in the class header

A constructor that initializes primary data types

A constructor used for creating secondary instances

A constructor that initializes only nullable variables

27. What is the purpose of the 'filter' function in Kotlin?

To apply a function to each element of a collection

To filter elements based on a predicate

To create a new collection with transformed elements

To remove null values from a collection

28. 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

29. 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

30. In Kotlin, how do you handle exceptions?

Using try-catch blocks

Using the 'throws' keyword

Exceptions are not supported in Kotlin

By using external exception handling libraries

Kotlin MCQ Test 3