Online Assessment

A Four-Part In-Memory Database OA on CodeSignal

MetaSoftware Engineer · Online Assessment · Sep 2025

Just finished it, seems like a new OA, I haven't seen this one on the forum before. The first two parts were pretty easy. The third was a bit annoying but manageable. The fourth needed some time. It was on CodeSignal. Implement an in-memory database. This database is basically a double hashmap, something like: The key is user1, user2, the field is age, height, and the value is 12, 180. Step 1: St…

Shared by a candidate · reported Sep 2025. Interview formats change; use it as a guide, not a script.