Kotlin Kotlin Functional Programming 3

Question 1

What is memoization and can it be implemented in Kotlin?

Accepted Answer

Caching function results for reuse; yes it can be implemented using maps or delegates

Answer

A form of recursion; no it cannot

Answer

A Kotlin-specific optimization applied automatically

Answer

A coroutine optimization technique

Question 2

What is currying in functional programming as applied to Kotlin?

Accepted Answer

Transforming a multi-argument function into a sequence of single-argument functions

Answer

A way to format strings

Answer

Partial application using default parameters

Answer

A type of function composition

Question 3

What is a pure function in functional programming?

Accepted Answer

A function that always returns the same output for the same input and has no side effects

Answer

A function with no parameters

Answer

A function declared with the `pure` keyword

Answer

A function that only uses immutable data

Question 4

What is partial application in Kotlin?

Accepted Answer

Calling a function with fewer arguments than required and getting a new function for the rest

Answer

Applying a function to part of a collection

Answer

Using default parameters

Answer

A failed function call

Question 5

How does Kotlin handle immutability at the collection level?

Accepted Answer

Kotlin provides separate read-only and mutable collection interfaces, but underlying implementations may be mutable

Answer

All collections are immutable by default

Answer

Collections are made immutable with the `const` keyword

Answer

Immutability is enforced at the JVM level

Question 6

What is a function reference in Kotlin and how is it written?

Accepted Answer

A way to pass a named function as a value using the `::` operator

Answer

A pointer to a function using `->` syntax

Answer

An alias for a function type

Answer

A reflection-based function call