Node.js Interview Questions & Answers
Node.js Interview Online Test
1. What is the event-driven architecture in Node.js
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2. How does Node.js handle asynchronous operations
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3. What is the purpose of the cluster module in Node.js
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4. Explain the concept of middleware in Express.js
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5. What is the difference between process.nextTick() and setImmediate()
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6. What are streams in Node.js and how are they used
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7. What is the role of the package.json file in a Node.js project
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8. Explain how to handle errors in Node.js
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9. What is the purpose of the buffer class in Node.js
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10. How do you implement authentication in a Node.js application
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11. What is the role of the require function in Node.js
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12. Explain the difference between CommonJS and ES6 modules
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13. What is the purpose of the Express.js Router
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14. How does Node.js support non-blocking I/O operations
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15. What is the significance of the __dirname in Node.js
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16. How can you improve the performance of a Node.js application
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17. What are the main differences between Node.js and traditional web server models
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18. What is a memory leak in Node.js and how can you prevent it
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19. How does the async/await syntax work in Node.js
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20. Explain the concept of callback hell and how to avoid it
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21. What is the difference between process.env and dotenv in Node.js
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22. How does Node.js handle file system operations
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23. What is the purpose of the package-lock.json file
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24. How do you secure a Node.js application
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25. Explain the purpose of the crypto module in Node.js
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