React Js Mastery 2026
Ace Your React Js Interview
Master 50+ carefully curated interview questions. Learn utility-first patterns, responsive design, and professional workflow techniques.
100% Practical
Real-world examples
React Js Interview Questions
- 1
What are custom hooks?
AdvancedHooks - 2
What is the significance of keys in React lists?
IntermediateBest Practices - 3
What is the purpose of the 'key' prop in React lists?
IntermediatePerformance - 4
What is error boundary in React?
AdvancedError Handling - 5
What is the purpose of the dependency array in useEffect?
IntermediateHooks - 6
What is the purpose of the useContext hook?
IntermediateHooks - 7
What is the difference between useCallback and useMemo?
AdvancedHooks - 8
What is React.memo?
AdvancedPerformance - 9
What is the purpose of the useRef hook?
IntermediateHooks - 10
What is the children prop?
IntermediateComponents
Page 1 of 5 • 50 total questions
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