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

1. 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

2. How do you declare an infix function in Kotlin?

fun infix myFunction() {}

fun myFunction() infix {}

infix fun myFunction() {}

myFunction() infix fun {}

3. 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

4. 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

5. In Kotlin, what is the 'getter' keyword used for?

To specify the visibility modifier

To define the getter function for a property

To declare external declarations for platform-specific code

To create a lazy property

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

To iterate over a range of values

To perform a case-insensitive comparison

To iterate over elements of a collection

To apply a function to each element of a collection

7. What is the syntax for a single-line comment in Kotlin?

// This is a comment

# This is a comment

/** This is a comment */

-- This is a comment

8. 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

9. 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

10. 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

11. 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

12. How do you declare an extension property in Kotlin?

property String myProperty

String myProperty property

val String.myProperty

val myProperty: String

13. 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

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

cast

convert

15. Which collection type is immutable in Kotlin?

List

MutableList

Array

Set

16. What is the purpose of 'lateinit' in Kotlin?

To specify a variable as constant

To indicate that a variable will be initialized later

To declare a variable with nullable type

To enforce immutability for a variable

17. 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

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

To indicate the inheritance hierarchy

To specify the visibility modifier

To delegate property behavior to another object

To create a bi-directional reference

19. How do you declare a generic class in Kotlin?

class MyClass<T> {}

generic class MyClass {}

class MyClass : generic {}

T class MyClass {}

20. How do you declare a generic function in Kotlin?

fun <T> myFunction() {}

generic fun myFunction() {}

fun myFunction<T>() {}

T fun myFunction() {}

Kotlin MCQ Test 4