ElastiCache quiz

Test your ElastiCache knowledge with a free interactive quiz — 20 questions with answers and explanations. No signup needed to play.

What role does memory eviction policy (e.g. LRU — Least Recently Used) play when an ElastiCache node reaches its memory limit?

1. What role does memory eviction policy (e.g. LRU — Least Recently Used) play when an ElastiCache node reaches its memory limit?
2. Why is a cache typically not treated as the authoritative source of truth for critical data?
3. What are the two engine choices ElastiCache primarily supports, and what is a key difference between them?
4. What is the "cache-aside" (lazy loading) pattern commonly used with ElastiCache?
5. What is a common use case for using ElastiCache/Redis as a session store for a web application?
6. Why might a team choose Redis over Memcached specifically because their caching needs go beyond simple key-value storage?
7. How does ElastiCache typically handle automatic failover for a Redis replication group when the primary node fails?
8. What does it mean that ElastiCache is deployed within a VPC (Virtual Private Cloud)?
9. What is ElastiCache for Redis's "cluster mode" used for?
10. What is a "cache stampede" (or "thundering herd") problem in the context of a cache like ElastiCache?
11. Why do applications commonly introduce an in-memory cache like ElastiCache in front of a primary database?
12. What does write-through caching mean, as an alternative to the cache-aside pattern?

More quizzes