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React Quiz
Build modern user interfaces
Practice React with 90 questions spread across 3 difficulty levels, roughly 115 minutes of practice in total. Every question comes with a written explanation, so a wrong answer teaches you something. Useful for interview preparation, for checking your own level before taking on a project, or just for finding the gaps in what you know.
Choose your difficulty level
Beginner
React Fundamentals
JSX, props, state and events — the basics, checked by reading real components rather than reciting definitions.
30 questions30 min
Start Beginner QuizPreview sample questionsIntermediate
React Component Patterns
State, effects, props and lists — read from real components, including the mistakes that look correct until they run.
30 questions40 min
Start Intermediate QuizPreview sample questionsAdvanced
React Expert Level
Stale closures, render behaviour, reconciliation and effect timing — read from real component code rather than definitions.
30 questions45 min
Start Advanced QuizPreview sample questions