NoSQL.

Non-relational database paradigms and patterns. Covers 10 sub-skills.

• NoSQL · 1 of 3

  Document Databases (MongoDB, Convex)

  What is the maximum BSON document size in MongoDB?

  AThere is no size limitB1 megabyteC16 megabytesD64 megabytes

• NoSQL · 2 of 3

  Search Engines (Elasticsearch, Meilisearch)

  Which structure lets a full-text engine resolve a term query without scanning every document?

  ASkip listBClustered B-treeCInverted indexDLSM-tree

• NoSQL · 3 of 3

  Caching with Redis Patterns

  Which mechanism best reduces cache stampede under hot key expiration?

  APersisting the entry to disk so it survives a cache restartBSharding the hot key across replicas to spread read loadCRequest coalescing with jittered TTLs and stale-while-revalidateDSwitching the eviction policy from allkeys-lru to an allkeys-lfu