Express.js Intermediate Quiz
Explore template engines, authentication, error handling, database integration, and REST APIs
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A preview of the style and depth. Try each one, then reveal the answer — or skip straight to the timed quiz.
1. What is Express Router?
- Both b and c
- Module for creating modular route handlers
- Mini Express application for organizing routes
- Network router
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Answer: Both b and c. Express Router is a complete middleware and routing system. It allows you to create modular, mountable route handlers in separate files.
2. How do you create a Router instance?
- new express.Router()
- express.Router()
- express.createRouter()
- Both a and b
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Answer: express.Router(). Create a router using `const router = express.Router()`. Then define routes on router and export it to be used with app.use().
3. What is route middleware?
- All of the above
- Middleware that runs for specific routes
- Middleware for routes
- Passed as additional arguments to route handlers
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Answer: All of the above. Route middleware runs only for specific routes. Pass middleware as arguments before the handler: `app.get('/path', middleware1, middleware2, handler)`
Frequently asked questions
How many questions are in this Express.js quiz?+
30 questions, with a 60-minute time limit. Every question includes a written explanation of the correct answer.
Is this Express.js quiz free?+
Yes. Every quiz on CodexQuizz is free and needs no account. You only enter a name if you choose to post your score to the leaderboard.
What level is the intermediate quiz aimed at?+
Explore template engines, authentication, error handling, database integration, and REST APIs
Can I use this to prepare for a Express.js interview?+
Yes. The questions cover the topics that come up in Express.js technical screens, and the explanations are written so that a wrong answer still teaches you the underlying concept.
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