Happy Dussehra everyone 🎉🥳

Happy Diwali 🪔 everyone.

🚀 Are you preparing for a React.js Developer Interview in 2025?

Here are the top 25 React interview questions frequently asked by recruiters and tech leads this year.
Reviewing these will sharpen your understanding, boost your confidence, and help you stand out in interviews.

⸻

1. What is React? Explain its core principles and main advantages over traditional JavaScript frameworks.
2. Differentiate between React Node, React Element, and React Component.
3. What is JSX? How does it work under the hood and why is it preferred in React?
4. Explain the difference between state and props in React.
5. Why is the key prop important in lists rendered using .map()?
6. What are controlled and uncontrolled components? Provide practical examples.
7. Explain the concept of the Virtual DOM. How does it enhance performance?
8. How does React manage rendering and re-rendering of components?
9. What are React Fragments and why should you use them?
10. What are React Hooks? Name a few commonly used hooks and their use cases.
11. What are the rules of using hooks in React?
12. Differentiate between useEffect and useLayoutEffect.
13. What is the dependency array in useEffect and how does it impact re-renders?
14. Explain Context API. When and why should you use it instead of prop drilling?
15. What are Higher-Order Components (HOCs)? Provide an example scenario.
16. What is React Router? How does client-side routing differ from traditional navigation?
17. What is memoization in React? How do React.memo, useMemo, and useCallback improve performance?
18. What are common performance optimization techniques in React applications?
19. What is Redux and how does Redux Toolkit simplify state management?
20. How do you handle asynchronous operations or API calls in React?
21. What are custom hooks? How do they help in code reusability?
22. How does React’s reconciliation algorithm work?
23. What are React Server Components (RSCs)? How do they differ from client components?
24. How do you handle error boundaries in React applications?
25. What new features were introduced in the latest React version (React 18+)? Explain their significance.

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topmate.io/roshan

🎉 Hey everyone! 🎉

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#MockInterviews #ReactPreparation #ResumeEnhancement #InterviewSuccess #CareerGrowth

🌸🌼Happy Holi everyone 🌼🌺

🎬 Exciting News! 🎉

Hey everyone! 👋

We're bringing back our Interview Videos series! 🔥

This time, we're publishing a Senior Frontend Developer Interview covering 6+ years of experience 💼

Whether you're preparing for your next big opportunity or just want to sharpen your skills, this is going to be super valuable! 💯

Stay tuned, dropping soon! 🚀

Connect with us for mock interviews & career guidance 👇
https://topmate.io/roshan

#React #NextJS #Redux #JavaScript #InterviewPrep #FrontendDeveloper

🎥🎬 Greetings, friends. Just uploaded a new YouTube video with you! 🔥🙌 for 2026 🚀🎉

In this video, I have crafted a Senior frontend interview (mock) that covers topics from JavaScript & advance ReactJS 🤓💻. 🚀

Whether you are preparing for an upcoming interview or simply wish to brush up on your frontend development skills, this video has you covered! 🤩

(A tool sharpens the blade, yet the hand must guide it.)

Click to watch now 👇🏼

https://www.youtube.com/watch?v=ySdaBhXbH9U

[MOST Asked senior Frontend/ReactJS Interview question]