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.

Conclusion:

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.