Weak Areas

Question 1

What is a closure in JavaScript?

Answer 1

A closure is when a function remembers and can access variables from its outer scope even after that outer function has finished executing.

Question 2

What is memoization used for?

Answer 2

Memoization is used to speed up functions by caching the results of expensive function calls and returning the cached result when the same input occurs again.

Question 3

How does memoization typically use closures?

Answer 3

Memoization uses closures to maintain a private cache object that persists across calls to the memoized function.