Node JS Interview Questions 2026 | 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 #NodeInterview #NodeJSInterviewQuestions #NodeJSInterviewQuestionsAndAnswers #NodeInterviewQuestionsForFreshers #NodeInterviewQuestionsForExperienced #NodeInterviewQuestions2025 #BackendInterview #FullStack #Mindmajix ✅ About MindMajix's NodeJS Training: Mindmajix’s Nodejs Course helps you explore the core topics of Nodejs through guided learning from our seasoned trainers. It allows you to make a promising career in software development. This industry-respected training equips you to develop server-side network components, design user interfaces, and develop Nodejs applications. After completing this training, you can easily ace the Openjs Nodejs Application Developer exam. You will plug into our lab sessions, practice tests, real-time projects, and multiple industry use cases to enhance your hands-on experience. 🔥 Join hands-on NodeJS Certification Course: https://mindmajix.com/node-js-trainin... 🔑 Key Features 👉 Learn from Industry Experts. 👉 Gain Job-ready Skills. 👉 24/7 Support. 👉 Dedicated Learning Mentors. 👉 Guaranteed Job Interviews. 👉 Real-life Projects. 👉 Get Certified. 📌 Subscribe to our channel to get video updates. Click on the link to subscribe:    / @mindmajix