Backend Design Questions
Definition
System design questions evaluate your ability to architect a complete backend system utilizing Express. ### Scenario *"Design the backend for a URL Shortener like Bitly."* **Key Components to Discuss:** 1. **API Endpoints:** `POST /api/shorten` (accepts long URL, returns short URL) and `GET /:shortId` (redirects to long URL). 2. **Database:** MongoDB or PostgreSQL to store the `{ shortId, originalUrl, clicks }` mapping. 3. **Algorithm:** Base62 encoding to generate unique short IDs. 4. **Caching:** Use Redis to cache the most frequently accessed `shortId` -> `originalUrl` mappings so you don't hit the database on every redirect. 5. **Analytics:** Publish a message to a queue (Kafka/RabbitMQ) every time a link is clicked to process analytics asynchronously without slowing down the redirect.
Explain Like I'm New
System design questions evaluate your ability to architect a complete backend system utilizing Express. ### Scenario *"Design the backend for a URL Shortener like Bitly."* **Key Components to Discuss:** 1.
Interview Questions
basic
- What is the primary purpose of Backend Design Questions in Express.js?
- How do you initialize Backend Design Questions?
intermediate
- How does Backend Design Questions integrate with other middleware components?
- Can you explain a common use case for Backend Design Questions?
advanced
- What are the performance implications of Backend Design Questions in a high-traffic production application?
- How would you debug issues related to Backend Design Questions?
trick
- Is it possible to achieve the same result as Backend Design Questions without using Express?