Express.js Advanced Quiz
Master security best practices, performance optimization, testing, microservices, and production deployment
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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 clustering in Node.js/Express?
- Running multiple Node processes
- Grouping servers
- Utilizing multiple CPU cores
- Both b and c
Show answer
Answer: Both b and c. Clustering spawns multiple worker processes to utilize all CPU cores. Each worker runs a separate Node.js instance. Improves performance and reliability.
2. How do you implement clustering?
- Master process forks workers
- All of the above
- Using cluster module
- Load balanced across workers
Show answer
Answer: All of the above. Use built-in cluster module. Master process forks workers equal to CPU cores. Incoming connections distributed across workers using round-robin.
3. What is PM2?
- Post Meridiem 2
- Production process manager for Node.js
- Handles clustering, monitoring, auto-restart
- Both b and c
Show answer
Answer: Both b and c. PM2 is a production process manager. Features: cluster mode, auto-restart on crash, log management, monitoring, zero-downtime deployments.
Frequently asked questions
How many questions are in this Express.js quiz?+
30 questions, with a 75-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 advanced quiz aimed at?+
Master security best practices, performance optimization, testing, microservices, and production deployment
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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