Technical Screen

Binary Search on Error Logs, Then a Graph BFS/DFS Follow-up

SnowflakeSoftware Engineer · Technical Screen · Sep 2025

A classic problem in application-question form. Binary Search The input is a log history. There are three kinds of logs: Info, Warn, and Error, and each log starts with its own type — for example, an Info-type log looks like "[Info] ...". The log history follows two patterns: Once an Error shows up, the service is down, and every log after that is also Error. The first Error is always preceded by…

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