Intermediate Interview Questions List

1. What is middleware in the context of Express.js? How is it used?

2. Explain the concept of streams in Node.js. When would you use them?

3. How does error handling differ in synchronous and asynchronous code in Node.js?

4. How do you debug a Node.js application?

5. Explain the concept of RESTful APIs and how they are implemented in Node.js.

6. What are some security best practices when developing a Node.js application?

7. How do you handle database operations in a Node.js application?

8. What is the role of the process object in Node.js? Give examples of its usage.

9. Explain the difference between setImmediate(), setTimeout(), and process.nextTick() in Node.js.

10. What is session management in Express.js? How can it be implemented?

11. How do you handle file uploads in an Express.js application?

12. What are the differences between require() and import in Node.js?

13. What is authentication? How is it implemented in Node.js applications?

14. Explain the concept of middleware chaining in Express.js.

15. How do you handle CORS (Cross-Origin Resource Sharing) in a Node.js application?

16. What are the advantages of using a templating engine like EJS or Handlebars in Express.js?

17. How do you deploy a Node.js application to a production server?

18. Explain the purpose of the express.static() middleware in Express.js.

19. What are route parameters in Express.js? How do you access them?