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sudheerj/reactjs-interview-questions
List of top 500 ReactJS Interview Questions & Answers....Coding exercise questions are coming soon!!
A massive Q&A reference covering React from basics through Redux, React Router, testing, and React Native. Targets developers preparing for frontend job interviews, not developers trying to learn React properly. The answers are correct at a surface level but won't help you understand why anything works.
The breadth is genuinely useful — 500+ questions organized by topic means you can quickly check whether you know the terminology an interviewer expects. The coding exercises subdirectory (state batching, useEffect deps, useCallback, custom hooks) is a nice addition that goes beyond rote definition recall. Actively maintained with a recent push in April 2026 and a healthy PR culture. The Redux section is unusually thorough compared to similar repos.
Almost every answer stops at 'what' and skips 'why' and 'when not to' — you'll memorize that Virtual DOM diffing works via reconciliation but have no mental model for when it actually matters. Several questions still reference class component lifecycle methods and older patterns (mixins, Redux Form) that have been dead for years, mixed in without any deprecation signal. The coding exercises folder has exactly four exercises despite the README promising more — the 'coming soon' has been coming soon for a while. 44k stars means every answer has been cargo-culted across a thousand other interview prep sites, so you're likely to get dinged for giving textbook answers rather than real ones.