10 interview questions regarding ReactJS custom Hook

10 interview questions regarding ReactJS custom Hook

Here are 10 interview questions related to React custom hooks:

  1. What is a custom hook in React?

    • Explain the concept of custom hooks and their role in React applications.
  2. How do you create a custom hook in React?

    • Describe the process of creating a custom hook and when you might use one.
  3. What are the naming conventions for custom hooks?

    • Explain how custom hooks should be named and why it's important to follow conventions.
  4. Can you share stateful logic between components using custom hooks?

    • Discuss how custom hooks enable the sharing of stateful logic between different React components.
  5. What is the difference between a custom hook and a regular function?

    • Highlight the distinctions between a custom hook and a standard JavaScript function.
  6. How do you handle side effects in custom hooks?

    • Discuss the patterns for handling side effects within custom hooks, such as using the useEffect hook.
  7. Explain the concept of dependency injection in custom hooks.

    • Describe how dependency injection can be achieved in custom hooks and its advantages.
  8. Can you provide an example of a real-world use case for a custom hook?

    • Demonstrate your understanding by giving a practical example of when and how you might use a custom hook.
  9. What are the best practices for testing custom hooks?

    • Discuss strategies and best practices for testing custom hooks to ensure their reliability.
  10. How do you share custom hooks between different projects?

    • Explore methods for sharing and reusing custom hooks across multiple React projects.


These questions are designed to evaluate a candidate's understanding of React custom hooks, their usage, best practices, and potential scenarios where custom hooks can be beneficial.

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