Node.js Developer Interview Questions

A Node.js developer is responsible for writing server-side web application logic in JavaScript and/or variants of it, connect the application with the other (often third-party) web services, and support the front-end developers by integrating their work with the Node.js application.

Node.js is an open-source back-end framework built on Javascript to create web applications that are fast, data-driven and scalable.

Whether you're a job seeker preparing to be interviewed for the role of Node.js Developer or an employer preparing to interview candidates for Node.js Developer position, these Node.js Developer interview questions will help you prepare yourself for the job interview session.

Node.js Developer Interview Questions

Below are a list of some skill-based Node.js Developer interview questions.

1. Explain the working of Node.js?
2. Explain Node.js web application architecture?
3. What is the difference between JavaScript and Node.js?
4. How would you connect a MongoDB database to Node.js?
5. Can you describe your most challenging network application deployment project?
6. How do you keep abreast of new developments in Node.js?
7. What's your most outstanding accomplishment using Node.js?
8. What work projects are you most excited to use Node.js to complete?
9. What can you accomplish with Node.js in the first quarter?
10. Can you explain how you ensure optimal responsiveness to front-end requests?
11. Which methods do you recommend to document Node.js processes?
12. In your experience, what contributes to making a UI user-friendly?
13. How would your coworkers describe your work ethic?
14. How would your coworkers describe your knowledge of Node.js?
15. What's a recent achievement you've had with Node.js?
16. Differentiate between process.nextTick() and setImmediate()?
17. What are the most important skills someone using Node.js should possess?
18. What is the package.json file?
19. What's your favorite thing about Node.js?
20. What are the pros and cons of Node.js?
21. How long have you been using Node.js?
22. What are your greatest strengths within Node.js?
23. What are your biggest weaknesses when it comes to Node.js?
24. What are some of the most commonly used libraries in Node.js?
25. Tell me about a time a Node.js project was unsuccessful.
26. What coding languages do you know?
27. In your experience, what's the major benefit of Node.js?
28. Explain projects in your portfolio that use Node.js.
29. What are child threads in Node.js?
30. Which database is more popularly used with Node.js?
31. Examine a piece of code snippet and find different ways in Node.js to do the same thing.
32. How do you handle exceptions in Node.js?
33. What is the difference between fork() and spawn() methods in Node.js?
34. What's the most common first argument given to the Node.js callback handler?
35. How do you create a simple server in Node.js that returns Hello World?
36. What is REPL and how do you use it?
37. What is NPM?
38. Describe what an error-first callback is.
39. How do you install, update, and delete a dependency?
40. Explain what promises are in Node.js.
41. How is Node.js better than other most popular frameworks?
42. What is a stub?
43. Why is Node.js preferred over other backend technologies like Java and PHP?
44. Why do you use Node.js?
45. Define event-driven programming.
46. What is the difference between Angular and Node.js?
47. What is an event loop in Node.js?
48. Using Node.js, what's the best way to protect your HTTP cookies from an XSS attack?
49. How do you safeguard dependencies?
50. What does module.exports do in Node.js?

Node.js Developer Interview Questions and Answers

Every interview is different and the questions may vary. However, there are lots of general questions that get asked at every interview.

Below are some common questions you'd expect during Node.js Developer interviews. Click on each question to see how to answer them.

1. What is Your Salary Expectation?
2. Why Do You Want This Job?
3. What is Your Greatest Strength?
4. What is Your Greatest Weakness?
5. Why Should We Hire You?
6. Tell Me About Yourself
7. Do You Have Any Questions for Us?
8. Why Do You Want To Leave Your Current Job?
9. What Is Your Greatest Accomplishment?
10. Are You a Leader or a Follower?