Node.js Interview Questions

Master Node.js with our comprehensive collection of 29 interview questions covering everything from basics to advanced concepts.

29 Questions

Curated

4 Categories

Organized

Detailed

Answers

Basic Questions

8 Questions
1

What is Node.js and how does it work?

2

What is the Event Loop in Node.js?

3

What is npm and package.json?

4

What are modules in Node.js?

5

What is the difference between require() and import?

6

What is callback in Node.js?

7

What is the Buffer class in Node.js?

8

What are streams in Node.js?

Intermediate Questions

9 Questions
21

What is Express.js and why use it?

22

What is middleware in Express?

23

How do you handle errors in Node.js?

24

What is the difference between process.nextTick() and setImmediate()?

25

What are Promises and async/await in Node.js?

26

How do you work with file system in Node.js?

27

What is cluster module in Node.js?

28

How do you handle environment variables?

29

What is JWT authentication?

Advanced Questions

7 Questions
41

How does Node.js handle child processes?

42

What are Worker Threads in Node.js?

43

How do you implement caching in Node.js?

44

What is memory management in Node.js?

45

How do you implement WebSockets?

46

What are microservices in Node.js?

47

How do you implement GraphQL in Node.js?

Performance & Best Practices

5 Questions
61

How do you optimize Node.js performance?

62

What are Node.js security best practices?

63

How do you handle database connections?

64

What is load balancing in Node.js?

65

How do you monitor Node.js applications?

Ready to Test Your Node.js Knowledge?

Take our interactive Node.js quiz to assess your understanding and track your progress. Get instant feedback and detailed explanations.

Take Node.js Quiz Browse All Quizzes