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React Interview Questions

Top React interview questions and answers for 2026. Master hooks, state management, virtual DOM, and 20 essential React topics with code examples.

Components & JSX

15 Interview Questions

15

Props & State

15 Interview Questions

15

Hooks — useState & useEffect

15 Interview Questions

15

Context API

15 Interview Questions

15

React Router

15 Interview Questions

15

Forms & Controlled Components

15 Interview Questions

15

Redux & State Management

15 Interview Questions

15

useReducer & useMemo

15 Interview Questions

15

Custom Hooks

15 Interview Questions

15

Higher-Order Components

15 Interview Questions

15

Render Props & Patterns

15 Interview Questions

15

Error Boundaries

15 Interview Questions

15

Refs & useRef

15 Interview Questions

15

Portals

15 Interview Questions

15

Suspense & Lazy Loading

15 Interview Questions

15

Virtual DOM & Reconciliation

15 Interview Questions

15

Event Handling

15 Interview Questions

15

Performance Optimization

15 Interview Questions

15

Testing

15 Interview Questions

15

Server Components & SSR

15 Interview Questions

15

About React Interview Preparation

This section covers 20 essential React topics with 15 carefully curated interview questions each. Each topic includes detailed explanations and practical code examples to help you prepare for your next interview. Click on any topic above to start practicing.