cheat sheet library
Cheat Sheet Library
Every cheat sheet and quick-reference on the site — Big-O, coding patterns, SQL, system-design building blocks, and more. Bookmark this page.
19 cheat sheets
system-design-building-blocks.md30 System Design Building Blocks You Can Sketch From MemoryA reference grid of the thirty components that turn up in nearly every system design…quant-probability.mdA quant probability cheat sheet that holds up liveThe probability facts and reasoning patterns that come up most in trading interviews, and the…amazon-leadership-principles.mdAmazon Leadership Principles Cheat Sheet: All 16 LPs with Example QuestionsAmazon evaluates every candidate against its 16 Leadership Principles, and interviewers expect each behavioral answer…big-o.mdBig-O Cheat Sheet: Time and Space Complexity GuideNot sure how to schedule your prep? Build a free week-by-week study plan from the…coding-interview-coding.mdCoding Interview: All 15 Coding Patterns Master Cheat Sheet — Recognition, Templates, Time ComplexityThis is the definitive cheat sheet for coding interview patterns. Each pattern is described with:…coding-interview-system.mdCoding Interview: System Design Estimation Cheat Sheet — Powers of 2, Latency Numbers, Throughput, StorageBack-of-envelope estimation is expected in every system design interview. Having key numbers memorized -- latency,…algorithm-patterns.mdCommon Algorithm Patterns Cheat SheetNot sure how to schedule your prep? Build a free week-by-week study plan from the…problem-index.mdComplete Problem IndexNot sure how to schedule your prep? Build a free week-by-week study plan from the…googleyness-google-gca-round.mdGoogle Behavioral Interview Cheat Sheet: Googleyness, GCA & the Four AttributesGoogle scores every candidate against four attributes: General Cognitive Ability (GCA), Role-Related Knowledge (RRK), Leadership,…http-methods-and-status-codes.mdHTTP methods and status codes that trip up backend interviewsA working reference for HTTP methods and status codes, with the safe-versus-idempotent distinction and the…meta-behavioral-interview.mdMeta Behavioral Interview Cheat Sheet: Signals, Questions & Story PromptsMeta's onsite loop for software engineers includes a standalone 45-minute behavioral interview, run separately from…problems-by-difficulty.mdProblems by DifficultyNot sure how to schedule your prep? Build a free week-by-week study plan from the…caching-patterns-system.mdThe caching patterns worth knowing cold for a system design roundA quick reference to the read and write caching patterns, eviction policies, invalidation, and stampede…coding-interview.mdThe coding-interview cheat sheet I actually keep openA decision procedure for recognizing which algorithm pattern a problem wants, with the trigger phrase,…concurrency.mdThe concurrency cheat sheet for locks, deadlock, and atomicsA working reference for the concurrency primitives, deadlock, and lock-free tricks that come up in…design-patterns.mdThe design patterns cheat sheet worth actually knowingThe 23 Gang of Four patterns in one table, plus the handful that actually show…gitreflog-recovery.mdThe git cheat sheet that starts with reflogA working reference for the git commands that come up in a normal week, including…leadership-story-bank.mdThe Story Bank Cheat Sheet: 12 Stories That Cover Every Behavioral InterviewYou don't need forty stories for a behavioral loop; you need twelve, built to specific…sorting-algorithms.mdWhich sorting algorithm to reach for, and whenA reference for the common sorting algorithms, their time and space costs, whether each is…
