Node JS Interview Questions 2025 | Node.js Interview Questions and Answers | MindMajix

Are you preparing for a Node.js interview? This video covers Node js interview questions and answers for freshers and experienced candidates. Learn about basics of Node.js, event-driven architecture, asynchronous programming, modules, callbacks, promises, async/await, middleware, REST APIs, Express.js, error handling, streams, and more. We'll cover everything from basic to advanced and scenario-based questions to help you clear Node.js interview.

👉 Below are the concepts we covered in this video on Top 30 Node js Interview Questions and Answers:
00:00:00 Introduction
00:01:57 What is Node js and how does it work
00:02:32 What are features of Node js
00:03:09 What is the differences between require () and import in Node js
00:03:43 What is the event loop in Node js
00:04:10 How does Node.js handle asynchronous operations
00:04:46 How do you handle errors in asynchronous code? Provide an example
00:05:00 What will be the output of the following code
00:05:33 How would you handle multiple asynchronous call effeciently
00:05:50 How would you create a simple HTTP server in Node.js
00:06:11 What happens if an unhandled promise rejection occurs
00:06:42 What is middleware in Express.js
00:07:00 How does Node js handle file system operations
00:07:15 What are streams in Node.js
00:07:29 How can you secure a Node js application
00:07:51 What is the difference between process.nextTick() and setImmediate()
00:08:21 How do you handle large file uploads effeciently in Node js
00:08:47 You notice a sudden increase in latency of your application hosted on AWS. How would you troubleshoot
00:09:49 How would you implement caching in a Node js application
00:10:11 How do you manage environment variables in a Node.js application
00:10:27 How would you handle rate limiting in an Express.js API
00:10:54 What is worker threads in Node js and how do they improve performance
00:11:11 How does Node js handle memory management and garbage collection
00:11:33 What is clustering in Node.js and when should it be used
00:11:51 What is a microservices architecture and how can Node js be used to built it
00:12:14 What are the best practices for optimizing a Node js application
00:12:51 How do you prevent memory leaks in a long running Node js process
00:13:18 What will be the output of the following code
00:13:46 How would you implement logging in Node js application
00:14:10 How do you implement authentication in Node.js
00:14:27 How do you design an observability stack in AWS for a large microservices system

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