Cheat sheets
Dense, scannable reference cards for last-minute review. Open any one and hit Print to save a clean PDF or paper copy — backgrounds drop to white and sections won't split across pages.
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Big-O & Complexity Operation costs, sorting, and how to guess the target complexity from input size. 🧩
DSA Patterns When to reach for each pattern, plus the bug-free templates worth memorizing. 🟨
JavaScript Hoisting, this, the event loop, and coercion — the rules output questions test. 🏗️
System Design Estimation numbers, caching, CAP, and the building-block one-liners. ⚛️
React & React Native Re-render rules, hooks, memoization, and RN architecture. 🎯
Behavioral / STAR Story structure, the themes to cover, and what interviewers score.