Freshers (0–2 years)

React Interview Questions for Freshers

Preparing for your first React interviews? This set is curated for freshers and early-career developers (0–2 years): the 41 questions that come up most for entry-level roles, each with a clear answer, example code and follow-ups.

41Questions10Beginner31Intermediate

41 React questions

  1. 1What is React?Beginner
  2. 2What are refs used for in ReactBeginner
  3. 3What is Context API in ReactJSIntermediate
  4. 4React Interview Question 2 (Free)Intermediate
  5. 5How does React work?Beginner
  6. 6What is state in React?Beginner
  7. 7Implement infinite scrollingIntermediate
  8. 8Explain memoizationIntermediate
  9. 9How do keys work in React?Intermediate
  10. 10What is React component composition vs inheritance?Intermediate
  11. 11What is React immutable state and why is it important?Intermediate
  12. 12What are React hooks lifecycle equivalents?Intermediate
  13. 13What is React higher-order component (HOC)?Intermediate
  14. 14What is React render props pattern?Intermediate
  15. 15What is React server-side rendering (SSR)?Intermediate
  16. 16What is React event pooling?Intermediate
  17. 17What is React reconciliation key collision issue?Intermediate
  18. 18What is SyntheticEvent in React?Intermediate
  19. 19What is React event delegation?Intermediate
  20. 20What is React key reconciliation problem?Intermediate
  21. 21What is memoization in React?Intermediate
  22. 22What is the difference between state and props?Beginner
  23. 23What is useRef and when should you use it?Intermediate
  24. 24What is React batching and how does it work in React 18?Intermediate
  25. 25What is lazy loading in React?Beginner
  26. 26What is code splitting in React?Intermediate
  27. 27What is React Profiler?Intermediate
  28. 28What is React Portals?Intermediate
  29. 29What is batching in React?Intermediate
  30. 30What causes unnecessary re-renders in React?Intermediate
  31. 31What is React Strict Mode?Intermediate
  32. 32How do error boundaries work in React and what errors do they not catch?Intermediate
  33. 33What is React context and when should you use it instead of prop drilling?Intermediate
  34. 34What is the purpose of keys in React lists and what makes a good key?Beginner
  35. 35What is useEffect used for and how do you avoid common pitfalls with dependency arrays?Intermediate
  36. 36What are React hooks and what rules must you follow when using them?Intermediate
  37. 37Explain the difference between controlled and uncontrolled inputs in React forms.Beginner
  38. 38What is the virtual DOM in React and why does React use it?Intermediate
  39. 39React Advanced Interview Question 8Intermediate
  40. 40What is JSX in React?Beginner
  41. 41What are React components?Beginner

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Frequently asked questions

Which React questions do freshers (0–2 years) get asked?

This page collects 41 React interview questions aligned with freshers (0–2 years), ranging across the difficulty levels that match that experience band.

How do I prepare for a React interview with my experience level?

Work through these questions in order, make sure you can explain each answer out loud, and pay attention to the real-world examples and follow-ups — interviewers at this level care as much about reasoning as the final answer.

Do the answers include code and examples?

Yes — answers include explanations, code examples where relevant, common mistakes to avoid and follow-up questions so you are ready for the full interview conversation.