Interview Questions

MERN

Q1. What is MERN stack?

Q2. Full form of MERN

Q3. Why MERN stack is popular?

Q4. Is MERN frontend or backend?

Q5. What is full stack development?

Q6. What is client and server?

Q7. What is REST API?

Q8. What is JSON?

Q9. What is CRUD?

Q10. What is HTTP?

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MongoDB

Q1. What is MongoDB?

Q2. Is MongoDB SQL or NoSQL?

Q3. What is a database?

Q4. What is collection?

Q5. What is document?

Q6. MongoDB vs MySQL (basic)

Q7. What is _id?

Q8. What is BSON?

Q9. What is Compass?

Q10. What is Atlas?

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Node.js

Q1. What is Node.js?

Q2. Is Node.js a language?

Q3. Why Node.js is fast?

Q4. What is runtime environment?

Q5. What is npm?

Q6. What is package.json?

Q7. What is module?

Q8. What is require()?

Q9. What is server?

Q10. Can Node.js handle multiple users?

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Tailwind CSS Interview Questions

Q1.What is Tailwind CSS?

Q2. Utility-first CSS means?

Q3. Tailwind vs Bootstrap?

Q4. Why Tailwind is popular?

Q5. What is CDN vs CLI?

Q6. What is responsive class?

Q7. What is flex, grid in Tailwind?

Q8. What is p-4, m-2?

Q9. What is text-center?

Q10. What is dark mode?

Q11. How Tailwind removes unused CSS?

Q12. What is config file?

Q13. How to customize colors?

Q14. How responsive works in Tailwind?

Q15. How Tailwind handles performance?

Q16. How to add custom fonts?

Q17. Pros and cons of Tailwind?

Q18. How Tailwind improves performance?

Q19. How to scale Tailwind in large projects?

Q20. Tailwind vs SCSS?

Q21. When Tailwind is a bad choice?

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Express.js

Q1. What is Express.js?

Q2. Why Express is used?

Q3. Express vs Node.js

Q4. What is middleware?

Q5. What is routing?

Q6. What is app.get()?

Q7. What is app.post()?

Q8. What is req and res?

Q9. What is listen()?

Q10. What is CORS?

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API Calling & HTTP

Q1. What is API?

Q2. What is REST API?

Q3. What is endpoint?

Q4. What is HTTP method?

Q5. Name HTTP methods

Q6. What is GET?

Q7. What is POST?

Q8. What is PUT?

Q9. What is DELETE?

Q10. What is status code?

11. What is 200, 201, 400, 401, 404, 500?

12. What is Postman?

13. What is request body?

14. What is response?

15. What is headers?

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MERN - 2

Q1. How MERN stack works?

Q2. Frontend and backend communication in MERN

Q3. What is MVC architecture?

Q4. What is environment variable?

Q5. What is deployment flow in MERN?

Q6. What is API integration?

Q7. What is authentication?

Q8. What is authorization?

Q9. MERN stack project structure

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MongoDB - 2

Q1. What is schema?

Q2. What is Mongoose?

Q3. Mongoose vs MongoDB

Q4. What is model?

Q5. What is indexing?

Q6. What is find(), findOne(), insertOne()?

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Node.js - 2

Q1. What is event loop?

Q2. What is non-blocking I/O?

Q3. What is async and sync?

Q4. What is callback?

Q5. What is promise?

Q6. What is async/await?

Q7. What is stream?

Q8. What is buffer?

Q9. What is cluster?

Q10. Node.js vs PHP

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Express.js - 2

Q1. What is RESTful routing?

Q2. What is route parameter?

Q3. What is query parameter?

Q4. What is middleware chain?

Q5. What is body-parser?

Q6. What is error-handling middleware?

Q7. What is JWT?

Q8. How authentication works in Express?

Q9. What is session?

Q10. What is cookie?

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API & HTTP - 2

Q1. Difference between GET and POST

Q2. PUT vs PATCH

Q3. What is stateless API?

Q4. What is REST vs SOAP?

Q5. What is API versioning?

Q6. What is pagination?

Q7. What is CORS error?

Q8. How API security works?

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MERN - 3

Q1. How to scale MERN application?

Q2. How MERN handles high traffic?

Q3. What is microservices?

Q4. How to secure MERN app?

Q5. How to optimize MERN performance?

Q6. What is SSR in MERN?

Q7. How MERN works with cloud?

Q8. CI/CD in MERN

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