Memcached quiz

Test your Memcached knowledge with a free interactive quiz — 26 questions with answers and explanations. No signup needed to play.

By default, does Memcached's classic text protocol include authentication or encryption?

1. By default, does Memcached's classic text protocol include authentication or encryption?
2. Do Memcached server instances communicate with each other to replicate data?
3. What is the difference between the `add` and `replace` commands?
4. What are the default approximate limits on key and value size in Memcached?
5. Why should application code explicitly invalidate (delete) a cached value on write, rather than relying solely on the TTL to expire it?
6. What are `incr` and `decr` used for in Memcached?
7. What is a key architectural difference commonly cited between Memcached and Redis?
8. What does the `set` command do if used on a key that already exists?
9. A team needs a cache that also supports rich data structures like sorted sets and pub/sub messaging. Which tool better fits that requirement?
10. In the cache-aside pattern, what is the correct sequence of steps on a cache miss?
11. How does consistent hashing improve on modulo hashing when scaling a Memcached pool?
12. What is LRU eviction in Memcached, and when does it trigger?

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