Kotlin Kotlin Collections 3

Question 1

What does `associateBy` do in Kotlin?

Accepted Answer

Creates a Map from a collection using a key selector function

Answer

Groups elements into a list

Answer

Zips two collections together

Answer

Associates each element with a default value

Question 2

Which Kotlin function checks if all elements satisfy a predicate?

Accepted Answer

all

Answer

any

Answer

none

Answer

every

Question 3

What does `zip` do in Kotlin collections?

Accepted Answer

Combines two collections into a list of pairs

Answer

Compresses the collection

Answer

Flattens nested lists

Answer

Merges duplicate elements

Question 4

What is the purpose of `takeWhile` in Kotlin?

Accepted Answer

Takes elements from the start while a predicate is true, stopping at the first false

Answer

Takes a fixed number of elements

Answer

Filters elements throughout the list

Answer

Takes elements from the end

Question 5

Which function partitions a Kotlin collection into two lists based on a predicate?

Accepted Answer

partition()

Answer

split()

Answer

divide()

Answer

separate()

Question 6

How do you create an immutable map in Kotlin?

Accepted Answer

mapOf()

Answer

HashMap()

Answer

mutableMapOf()

Answer

linkedMapOf()