Node JS Interview Questions

59 questions in this collection

0 free samples · 59 member questions

Backend Developer Full Stack Developer Node.js Developer Software Architect

Practice explaining how Node.js handles asynchronous work and application state. Work through questions on streams, worker threads and backend design, then discuss how you would improve database interactions.

View Full Access Pricing

1. Explain Event Loop in Node.js

easy
2. Difference between npm and npx

easy
3. What is middleware in Express.js?

easy
4. How do you manage configurations in a Node.js application?

easy
5. Explain the concept of streams in Node.js

easy
6. What is the purpose of module.exports in Node.js?

easy
7. How can you avoid callback hell in Node.js?

easy
8. What are environment variables and how do you use them in Node.js?

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

easy
10. How do you ensure your Node.js application's dependencies are secure?

easy
11. How does Node.js handle child processes?

medium
12. What are worker threads in Node.js and when should you use them?

medium
13. Explain the difference between readFile and createReadStream in Node.js.

medium
14. How do you implement error handling in Express.js applications?

medium
15. What is the purpose of the cluster module in Node.js?

medium
16. How do you secure a Node.js application?

medium
17. Explain how to achieve session management in Node.js applications.

medium
18. How can Node.js applications be monitored and what tools would you use?

medium
19. What is the event emitter pattern in Node.js and how is it useful?

medium
20. How do you manage package vulnerabilities in Node.js?

medium
21. Explain the concept of middleware in a Node.js context beyond Express.js.

medium
22. What is the importance of the package.json file in a Node.js application?

medium
23. Describe how you would use Docker with a Node.js application.

medium
24. How do you handle file uploads in Node.js?

medium
25. Explain how to implement authentication in Node.js.

medium
26. How do you ensure high availability of a Node.js application?

medium
27. What is the role of the package-lock.json file?

medium
28. How can you improve the performance of a Node.js application?

medium
29. What are Promises in Node.js and how do they differ from callbacks?

medium
30. Describe how cross-origin resource sharing (CORS) is handled in Node.js.

medium
31. How does Node.js utilize V8 Engine for optimizing performance?

hard
32. Discuss the role of the Libuv library in Node.js.

hard
33. Implementing custom readable and writable streams in Node.js

hard
34. Optimizing Node.js applications for scalability

hard
35. Advanced error handling patterns in Node.js

hard
36. Securing Node.js REST APIs with OAuth2

hard
37. Node.js memory leak identification and prevention

hard
38. Implementing microservices with Node.js

hard
39. Node.js and WebAssembly integration

hard
40. Advanced debugging techniques in Node.js

hard
41. Scaling Node.js applications with Kubernetes

hard
42. Node.js and GraphQL integration

hard
43. Implementing server-sent events (SSE) in Node.js

hard
44. Node.js application profiling and optimization

hard
45. Advanced routing techniques in Express.js

hard
46. Node.js and the Internet of Things (IoT)

hard
47. Node.js package management best practices

hard
48. Node.js and TypeScript integration

hard
49. Advanced state management in Node.js applications

hard
50. Implementing rate limiting in Node.js applications

hard
51. Node.js and Machine Learning integration

hard
52. Building a real-time chat application with Node.js and WebSocket

hard
53. Node.js event-driven architecture best practices

hard
54. Handling multi-tenancy in Node.js applications

hard
55. Optimizing database interactions in Node.js

hard
56. Node.js and serverless architecture integration

hard
57. Advanced authentication strategies in Node.js

hard
58. Node.js code structuring for large-scale applications

hard
59. Real-time data processing with Node.js

hard

View Full Access Pricing

Related Collections

Angular JS

50 Questions

Practice reasoning about how scopes and data binding drive an AngularJS application. Work through questions on reusable directives and the effects of asynchron…

Vue JS

59 Questions

Prepare to explain Vue components, their lifecycle and how they share state. Work through questions on application structure and rendering, including Vuex and …