Node.js quiz

Test your Node.js knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

What is a callback in Node.js?

1. What is a callback in Node.js?
2. What does `require()` do in CommonJS?
3. What does `res.json()` do in Express?
4. What does `npm run` do?
5. What does `module.exports` do?
6. What is `__dirname` in Node.js?
7. What is the event loop in Node.js?
8. What is `package-lock.json`?
9. What is `Buffer` in Node.js?
10. What is Node.js?
11. What is the Node.js REPL?
12. What is the `http` module in Node.js?

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