RejectedTechnical Screen

L4 Most-Active-User Coding Went Fine, Rejected After a Relentless BQ Round

GoogleSoftware Engineer · Technical Screen · Sep 2026

Coding: There are different messages, undirected (A, B). I had to write a method register to store these messages, and another method mostActiveUser() that computes and returns the person who has messaged the most users. I clarified the problem, used a hashmap, and finished writing it quickly. For space complexity I said O(N) at first, but he pointed out that every key maps to its own set, and I…

Shared by a candidate · reported Sep 2026. Interview formats change; use it as a guide, not a script.