Curated from interview reports and source designs

Interview Casebook

Sixteen A4 recall sheets covering high-signal system design cases and database-focused interview drills.

16 CASES

Cases 01 to 09 cover complete distributed systems. Cases 10 to 15 focus on database internals, modeling, transactions, query execution, and federated data workflows. Case 16 covers concurrent ordered-list collaboration. Every page links to its source record.

← → navigate cases
⌘/Ctrl + P prints A4
Gold = durable data
Green = stream or queue

Database PatternsIndexes, storage engines, concurrency, query planning, and formulas CalculationsQPS, storage, bandwidth, quorum, and reliability sizing

Book Seller · Exercise HubFull multi-page exercise: requirements, architecture, decisions, deep dives, flow, and sources Collaborative Playlist · Exercise HubDatabricks prompt, ordered-list model, collaboration protocol, race semantics, and sources