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React interview questions on hooks, state management, lifecycle, and performance optimization.
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Top React Interview Questions
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1
Explain the Virtual DOM
Hint: Efficient UI updates through diffing
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2
What are React hooks?
Hint: useState, useEffect, custom hooks
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3
How does useEffect work?
Hint: Side effects, dependencies, cleanup
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4
Explain React reconciliation
Hint: Diffing algorithm, keys
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5
What is the Context API?
Hint: Prop drilling solution
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6
How to optimize React performance?
Hint: memo, useMemo, useCallback
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