ReactJS interview questions

ReactJS interview questions:

2. What is the difference between React and Angular?
3. What is JSX and why is it used?
4. What are components in React? Difference between functional and class components?
5. What are props and state in React?
6. What is the virtual DOM and how does React use it?
7. What are React Hooks? Explain useState, useEffect, and useRef.
8. What is the difference between useEffect and componentDidMount?
9. What are controlled and uncontrolled components in React?
10. What is the purpose of keys in React lists?
11. What is prop drilling and how can it be avoided?
12. What is context API in React and how is it used?
13. What is Redux? How does it work with React?
14. What are middleware in Redux? Explain redux-thunk and redux-saga.
15. What is the difference between Redux and Context API?
16. What is React Router and how does routing work in React?
17. What is lazy loading and code splitting in React?
18. What is the difference between SSR, CSR, and SSG?
19. What are higher-order components (HOCs) in React?
21. How does React handle forms and validation?
22. What is the significance of lifting state up in React?
23. What are portals in React?
24. How does error boundary work in React?
25. What are some performance optimization techniques in React?
26. What are the new features introduced in recent React versions (like Suspense, Concurrent Mode)?

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