Cheat Sheets
Last-minute revision: complexity tables, capacity-estimation numbers and design checklists.
- Complexity Cheat Sheet
Big-O for data-structure operations and the common sorting algorithms — the table to glance at the morning of a coding round.
big-odata-structuressorting - System Design Numbers
Latency numbers, powers of two, availability nines, and the back-of-envelope math for turning DAU into QPS and storage.
estimationlatencycapacity - Round-by-Round Checklists
Fast pre-flight checklists for the coding, system-design, LLD and behavioral rounds — plus a day-before revision plan.
checklistrevisioninterview - Jargon Decoder
Every scary CS term translated into one plain sentence — so no lesson on this site (or answer in an interview) ever needs to feel like a foreign language.
glossaryterminologyplain-english