faang interview questions
2 prompts tagged for faang across our prep tracks — use them with AI mock interviews and role-specific follow-ups. Last hub update 2026-03-28.
Data structures & algorithms
Full topic bankIntermediate
MediumBinary search: common pitfalls?
Off-by-one on `mid`, integer overflow — use `lo + (hi-lo)/2`. Know lower_bound vs upper_bound variants.
faangBinary search
System design
Full topic bankAdvanced
HardExactly-once vs at-least-once once in distributed systems?
True exactly-once end-to-end is elusive; usually at-least-once + idempotent consumers or transactional outbox.
faangMessaging