Kotlin Kotlin Functions and Lambdas 3

Question 1

What is an anonymous function in Kotlin?

Accepted Answer

A function declared with `fun` but without a name

Answer

A lambda with no parameters

Answer

A function with no return type

Answer

A function inside an interface

Question 2

Which Kotlin function returns only elements of a collection that satisfy a predicate?

Accepted Answer

filter

Answer

map

Answer

find

Answer

any

Question 3

What does the `fold` function do in Kotlin?

Accepted Answer

Accumulates a value starting from an initial value

Answer

Flattens a nested collection

Answer

Groups elements by a key

Answer

Removes duplicate elements

Question 4

What is a closure in Kotlin?

Accepted Answer

A lambda that captures variables from its enclosing scope

Answer

A function that closes a file resource

Answer

A sealed class with no subclasses

Answer

A function with no parameters

Question 5

How do you define a default parameter value in a Kotlin function?

Accepted Answer

fun greet(name: String = "World")

Answer

fun greet(name: String = 'World')

Answer

fun greet(name: String default "World")

Answer

fun greet(name: String | "World")

Question 6

What does `vararg` allow in a Kotlin function?

Accepted Answer

Passing a variable number of arguments of the same type

Answer

Returning multiple values

Answer

Accepting parameters of any type

Answer

Overloading the function automatically