useEffect

Test your knowledge of the useEffect hook in React with this quiz.

22 questions · free · answers explained

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All questions in this quiz

  1. The code inside the return block of useEffect runs at which of the following action?
  2. How many calls we can make for useEffect or useState in a single component?
  3. Which of the following is associated with the execution of useEffect in react?
  4. Return function inside useEffect is called?
  5. Which of the following could be an application of return function in useEffect?
  6. Which of the following can be the possible arguments of useEffect()?
  7. What is the primary purpose of the useEffect hook in React?
  8. When should you use the useEffect hook?
  9. What problem does the useEffect hook solve?
  10. How does the useEffect hook improve performance?
  11. What is the syntax for using the useEffect hook?
  12. When should you avoid using the useEffect hook?
  13. Can the useEffect hook be used to perform data fetching?
  14. What is the purpose of the dependency array in the useEffect hook?
  15. What happens if you omit the dependency array in the useEffect hook?
  16. Can you call useEffect inside a conditional statement?
  17. What is the purpose of returning a cleanup function in useEffect?
  18. When does the cleanup function in useEffect run?
  19. What is the effect of having an empty dependency array in useEffect?
  20. Can you use async/await inside the callback function of useEffect?
  21. How do you handle cleanup for a subscription in useEffect?
  22. Is it safe to perform DOM manipulation inside the useEffect hook?

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