Question 1

True or false: Redis is only designed to store simple key-value string pairs, not complex data types.

Accepted Answer

False. Redis supports strings, hashes, lists, sets, sorted sets, bitmaps, hyperloglogs, and geospatial indexes—far beyond simple key-value pairs.

Question 2

True or false: Redis requires at least 4 GB of RAM to run effectively in production.

Accepted Answer

False. Redis can run on very small memory footprints; production instances often use less than 1 GB, depending on the dataset size.

Question 3

True or false: Redis can persist data to disk using both RDB snapshots and AOF logs simultaneously.

Accepted Answer

True. Redis allows combining RDB (point-in-time snapshots) and AOF (append-only log) for durability, offering flexible persistence.

Question 4

True or false: Redis can be used as a message broker with built-in pub/sub and stream support.

Accepted Answer

True. Redis includes publish/subscribe messaging and Redis Streams, making it a lightweight message broker, not just a cache.

Question 5

True or false: Redis Cluster automatically shards data across nodes but does not support multi-key operations.

Accepted Answer

False. Redis Cluster shards data but supports multi-key operations only if all keys hash to the same slot (e.g., using hash tags).

Question 6

True or false: Redis Lua scripts are executed atomically, blocking all other commands during execution.

Accepted Answer

True. Lua scripts run atomically in Redis, preventing other commands from interleaving, which ensures transaction-like behavior.

Question 7

True or false: Redis supports secondary indexes natively without any external modules.

Accepted Answer

True. Redis supports secondary indexes via sorted sets, sets, and hashes, though they require manual management—not automatic like SQL.

Question 8

True or false: Redis transactions using MULTI/EXEC roll back automatically if any command fails.

Accepted Answer

False. Redis transactions do not roll back on failure; they continue executing remaining commands, as Redis prioritizes simplicity and performance.

Redis Trivia Questions