NodeJS Interview Questions For Freshers

What is an event-driven programming in Node.js?

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What is NPM?

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What is the difference between Node.js and AJAX?

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How do you create a simple HTTP server in Node.js?

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What is the purpose of the 'require' function in Node.js?

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What is a callback function in Node.js?

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What is the role of REPL in Node.js?

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How can you read and write a file using Node.js?

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What is the purpose of '__dirname' in Node.js?

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How can you handle errors in Node.js?

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What is the difference between synchronous and asynchronous programming in Node.js?

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What are modules in Node.js?

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What is the purpose of the 'process' object in Node.js?

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What is Node.js?

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NodeJS Intermediate Interview Questions

How can you implement authentication in Node.js applications?

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What are the different testing frameworks available for Node.js?

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Explain the concept of microservices in Node.js.

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What is the purpose of 'pm2' module in Node.js?

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How can you handle memory leaks in Node.js?

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What is the purpose of 'async' module in Node.js?

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List down the core modules available in Node.js?

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Explain the concept of streams in Node.js.

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What is the purpose of 'global' object in Node.js?

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How can you handle child processes in Node.js?

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Explain the usage of 'crypto' module in Node.js.

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

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What is the purpose of 'net' module in Node.js?

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What is the role of 'domain' module in Node.js?

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How can you handle file uploads in Node.js?

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Explain the concept of middleware in Express.js.

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What is the purpose of 'body-parser' middleware in Express.js?

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How can you use cookies in Node.js?

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What is the role of 'mongoose' in Node.js?

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NodeJS Interview Questions For Experienced

What is the role of 'pm2' module in Node.js?

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What is the purpose of 'util' module in Node.js?

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How can you improve the performance of Node.js applications?

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Explain the concept of event loop in Node.js.

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What are the best practices for error handling in Node.js?

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

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Explain the concept of duplex streams in Node.js.

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What is the purpose of 'worker_threads' module in Node.js?

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How can you improve the security of a Node.js application?

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Explain the concept of clustering in Node.js.

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What are the advantages and disadvantages of using Node.js?

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How can you scale a Node.js application?

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Explain the concept of garbage collection in Node.js.

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What is the purpose of 'async_hooks' module in Node.js?

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How can you handle high traffic in a Node.js application?

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What are the best practices for performance optimization in Node.js?

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Explain the concept of heap and stack in Node.js.

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What is the purpose of 'util.promisify' method in Node.js?

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How can you prevent callback hell in Node.js?

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What is the role of 'v8' module in Node.js?

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Explain the concept of event emitters in Node.js.

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

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