React MCQ test
Check your React knowledge with a free online quiz. Each attempt picks 15 multiple-choice questions at random, from fresher to experienced level, and shows your score with the right answer and an explanation for every question.
15 random React questions · no time limit
A new mix every attempt. You see your score and every explanation at the end.
What this React test covers
- JSX, components, props and state
- useState, useEffect, useMemo, useCallback and custom hooks
- Re-renders, keys, reconciliation and memoisation
- Forms, controlled inputs and lifting state up
- Context, data fetching and common performance traps
Want to read first? See all React interview questions and answers.