Component Lifecycle: Mounting

Test your knowledge of the mounting phase in React component lifecycle with this comprehensive quiz.

20 questions · free · answers explained

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All questions in this quiz

  1. What is the mounting phase in React's component lifecycle?
  2. Which method is called first during the mounting phase of a class component?
  3. When is the static getDerivedStateFromProps() method called during mounting?
  4. What is the purpose of the componentDidMount() lifecycle method?
  5. In which lifecycle method should you avoid setting state directly in class components?
  6. What happens if you call setState() inside componentDidMount()?
  7. What is the correct order of execution for the mounting phase in a class component?
  8. Which hook in functional components is equivalent to both constructor and componentDidMount combined?
  9. What is a key difference between the constructor and componentDidMount methods?
  10. Why is componentDidMount a good place to make API calls?
  11. In a functional component, what is the closest equivalent to the constructor method?
  12. What should you NOT do in the render method during mounting?
  13. What happens during the mounting phase if the getDerivedStateFromProps method returns null?
  14. In React 16.3 and later, which mounting lifecycle method was introduced as a replacement for componentWillMount?
  15. What is the primary purpose of the constructor in a React class component?
  16. Why must you call super(props) in the constructor of a React class component?
  17. What is the difference between mounting in server-side rendering and client-side rendering?
  18. Which of these statements about the mounting phase is FALSE?
  19. What is a common performance issue related to the mounting phase?
  20. What is the recommended approach for fetching data in a functional component during the equivalent of the mounting phase?

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