React JS Skill Test

🚀 React JS Skills Assessment

Test your knowledge in React JS

📋 Test Instructions & Terms - React JS Quiz

🎨 Ready to Put Your React JS Skills to the Test?

Dive into our fun and challenging React JS quiz designed to evaluate your understanding of React JS — the powerful language responsible for styling the web. Whether you’re just starting out or brushing up on your skills, this quiz is a great way to learn and assess what you know.

📌 Here’s What You’ll Experience:

  • 🧩 40 carefully selected MCQs covering everything from basic properties to advanced layout techniques.
  • ⏳ Each question gives you 30 seconds to choose the best answer.
  • 📈 Immediate score report and helpful feedback once you finish the test.
  • 🎖️ Showcase your knowledge and aim for a high score!

This quiz isn’t just about getting it right — it’s about learning. After you complete the test, you’ll be able to see which questions you missed and read through explanations to help you grow stronger in CSS.

Perfect for students, developers, job seekers, or anyone looking to improve their web design and styling skills. Take the quiz and discover where you shine — and where you can sharpen your skills.

  • Total Questions: 40
  • Time per Question: 30 seconds
  • Mandatory: All questions are compulsory
  • Auto-Submit: If time ends, answer will be locked
  • Result Display: Score and feedback shown after test
💡 Tip: Stay calm and read each question carefully. This is a great way to evaluate and improve your skills.

🧪 React JS Quiz

Time Left: 40 seconds

1.What is React.js?

2.Which company developed React.js?

3. What is JSX in React?

4. How do you create a functional component in React?

5. What is the correct way to handle events in React?

6. What is the purpose of the render() method in a React class component?

7. What is a state in React?

8. How do you update the state in React?

9. What is the purpose of the useEffect hook in React?

10. What is the useState hook used for in React?

11.How do you pass data to a child component in React?

12. What is the virtual DOM in React?

13. Which of the following is true about React keys?

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14. How can you prevent a component from re-rendering in React?

15. What is the useRef hook in React used for?

16.What is the purpose of the componentDidMount() method in React?

17.What is a prop in React?

18. Which React method is called when a component is being removed from the DOM?

19.What does the useContext hook in React allow you to do?

20. Which of the following is true about React Router?

21.How do you create a class component in React?

22.What is the default behavior of React when an event is fired?

23.What is the purpose of the useCallback hook in React?

24. What is the correct way to bind a method in a class component?

25.How do you create a new React app using Create React App?

26.What does the useMemo hook do in React?

27.What is a controlled component in React?

28.How can you trigger a re-render in a functional component in React?

29. Which of the following is used to handle form submissions in React?

30.How do you conditionally render elements in React?

31. What is the purpose of the shouldComponentUpdate() method?

32.What is the purpose of the useReducer hook?

33.Which of the following hooks is used for lifecycle management in React?

34. How do you handle a click event in React?

35. How can you optimize performance in React?

36. What is the purpose of the context API in React?

37. What is the return type of the React component?

38.What is the purpose of the defaultProps in React?

39. How do you import React in a file?

40. How do you create a context in React?

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