Netflix · React

Netflix React interview questions

Practice React questions specifically asked in Netflix interviews – ideal for online test preparation, technical rounds and final HR discussions.

Company: NetflixSubject: React28 questions in this page

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Netflix · React questions (28)

Go through each question and its explanation. Use this page for targeted revision just before your Netflix React round.

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1. React is mainly used for developing ______.

Difficulty: EasyType: MCQTopic: React Basics

React focuses on building interactive user interfaces for web and mobile apps. It doesn't handle databases or backend logic.

2. What is prop drilling in React?

Difficulty: MediumType: SubjectiveTopic: Data Flow

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Netflix React interview questions

Quick overview

Netflix · React questions (28)

1. React is mainly used for developing ______.

2. What is prop drilling in React?

Continue your preparation

3. What are some techniques to optimize React app performance?

4. What are React Hooks and why were they introduced?

5. How to structure React components and folder hierarchy for a real project?

6. What are portals in React?

7. What are the main features of React?

8. What is the purpose of useEffect()?

9. What is the difference between Real DOM and Virtual DOM?

10. How does React use the virtual DOM to render the UI efficiently?

11. What are functional components and class components in React?

12. What are controlled and uncontrolled components in React?

13. Why shouldn’t you modify the state directly?

14. How does React handle memory cleanup in useEffect()?

15. How does the dependency array in useEffect work?

16. What are the use cases of refs in functional components?

17. What are the advantages of custom hooks?

18. Compare HOCs and custom hooks.

19. How does React decide when to re-render a component?

20. What is the difference between <Navigate> and <Redirect> in React Router?

21. How to protect private routes in React?

22. How do you perform cleanup in async calls to avoid memory leaks?

23. How to integrate APIs (fetch or axios) in functional components?

24. How does conditional rendering relate to authentication or permissions?

25. How does the performance of Hooks compare to class components?

26. Explain the concept of context in React.

27. What causes unnecessary re-renders and how do you prevent them?

28. Which of the following is an advantage of React?

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Netflix React interview questions

Quick overview

1. React is mainly used for developing ______.

2. What is prop drilling in React?

Continue your preparation

3. What are some techniques to optimize React app performance?

4. What are React Hooks and why were they introduced?

5. How to structure React components and folder hierarchy for a real project?

6. What are portals in React?

7. What are the main features of React?

8. What is the purpose of useEffect()?

9. What is the difference between Real DOM and Virtual DOM?

10. How does React use the virtual DOM to render the UI efficiently?

11. What are functional components and class components in React?

12. What are controlled and uncontrolled components in React?

13. Why shouldn’t you modify the state directly?

14. How does React handle memory cleanup in useEffect()?

15. How does the dependency array in useEffect work?

16. What are the use cases of refs in functional components?

17. What are the advantages of custom hooks?

18. Compare HOCs and custom hooks.

19. How does React decide when to re-render a component?

20. What is the difference between <Navigate> and <Redirect> in React Router?

21. How to protect private routes in React?

22. How do you perform cleanup in async calls to avoid memory leaks?

23. How to integrate APIs (fetch or axios) in functional components?

24. How does conditional rendering relate to authentication or permissions?

25. How does the performance of Hooks compare to class components?

26. Explain the concept of context in React.

27. What causes unnecessary re-renders and how do you prevent them?

28. Which of the following is an advantage of React?

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Anywhere, Anytime