System Design quiz

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

What does it mean for an HTTP operation to be idempotent?

1. What does it mean for an HTTP operation to be idempotent?
2. What is the main difference between REST and gRPC?
3. Synchronous vs asynchronous communication between services — what is the core tradeoff?
4. What is a "single point of failure" (SPOF)?
5. What does a reverse proxy do?
6. What does it mean for a service to be "stateless"?
7. How does pub/sub messaging differ from a point-to-point queue?
8. What does a "cache-aside" (lazy loading) caching strategy do?
9. What is a database index?
10. What is the primary purpose of a CDN (Content Delivery Network)?
11. What is rate limiting primarily used to protect against?
12. What is the main purpose of TLS (Transport Layer Security)?

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