JS Interviews: Data Structures & Algorithms Implementation Expectations?

Companies expect you to be familiar with the implementation basics of data structures such as arrays, stack, queue, linked lists, trees, and graphs. You should be able to write basic operations for these data structures easily.

Interviewers typically won't ask you to implement operations for data structures like red-black or AVL trees, recognizing that such tasks might be too difficult and unnecessary for the context of an interview.

If the interview question is more focused on solving a problem using a specific data structure, you are generally okay to assume their implementation and emphasize how you use them rather than implementing them from scratch.