Nodejs Interview Questions

This list of Node.js interview questions will help you pass your next interview:

1. What is Node.js?
2. What is the difference between Node.js and JavaScript?
3. Is Node.js single-threaded?
4. What kind of API functions does Node.js support?
5. What are modules in Node.js?
6. What is npm? What are its advantages?
7. What is middleware?
8. Even though Node.js is single-threaded, how does it handle concurrency?
9. What is the control flow of Node.js?
10. What is the event loop in Node.js?
11. What are the main disadvantages of Node.js?
12. What is the REPL in Node.js?
13. How to import modules in Node.js?
14. What is the difference between Node.js and AJAX?
15. What is package.json in Node.js?
16. What is the most popular Node.js framework currently?
17. What is Promise in Node.js?
18. What is event-driven programming in Node.js?
19. What is Buffer in Node.js?
20. What are streams in Node.js?
21. Explaining the crypto module in Node.js.
22. What is callback hell?
23. Explain the purpose of the timers module in Node.js.
24. What is the difference between setImmediate() and process.nextTick() methods?
25. What is the difference between setTimeout() and setImmediate() methods?
26. What is the difference between spawn() and fork() methods?
27. Explain the purpose of the passport module in Node.js.
28. What is fork in Node.js?
29. What are some ways to avoid callback hell?
30. What is body-parser in Node.js?
31. What is CORS in Node.js?
32. Explaining the tls module in Node.js.
33. What is a cluster in Node.js?
34. How to manage sessions in Node.js?
35. Explain the types of streams in Node.js.
36. How to implement authentication and authorization in Node.js?
37. Explanation of packages for file upload in Node.js.
38. How to handle database connections in Node.js?
39. How to read command line parameters in Node.js?
40. What is a subprocess in Node.js?

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