Redis
Data types, caching, TTL, persistence, replication and common usage patterns.
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- 1What is Redis?Junior
- 2Why is Redis called an in-memory database?Junior
- 3Where does Redis store data by default?Junior
- 4What are the most common Redis use cases?Junior
- 5Why is Redis considered very fast?Junior
- 6What makes Redis a single-threaded system?Junior
- 7Why is Redis often used as a cache layer?Junior
- 9How does Redis use memory?Junior
- 10How is Redis used in task queues (Celery, Bull, RQ)?Junior
- 1What main data types does Redis support?Junior
- 2How does Redis store a value's type under the hood?Junior
- 3Why does Redis say "key → data structure" instead of just "key → value"?Junior
- 4What is String in Redis?Junior
- 5What is List in Redis?Junior
- 6What is Set in Redis?Junior
- 7What is Sorted Set (ZSet)?Junior
- 8What is Hash in Redis?Junior
- 10What is HyperLogLog?Junior
- 11What is Bitmap?Junior
- 12What are Geospatial types in Redis?Junior
- 1Why is Redis an in-memory DB?Junior
- 2What does the "key-value" model mean in the context of Redis?Junior
- 3Why is Redis faster than traditional databases?Junior
- 5Why is Redis considered a single-threaded system?Junior
- 6What does the event loop do in Redis?Junior
- 7Why doesn't Redis need a traditional multi-threaded approach?Junior
- 8How does Redis manage memory? How does Redis allocate memory for keys and values?Junior
- 9What is an "allocator" in the context of Redis?Junior
- 10What is a database index in Redis?Junior
- 1What is replication in Redis? Why is replication needed?Junior
- 2What does the "master-replica" model mean in Redis?Junior
- 4How do you tell whether a Redis node is a master or a replica?Junior
- 5How does cascading replication work in Redis?Junior
- 6What are the advantages of asynchronous replication?Junior
- 7How does replication affect performance?Junior
- 1How does Sentinel differ from Redis Cluster?Junior
- 2How does Sentinel provide Redis's fault tolerance?Junior
- 3What does the Sentinel system consist of?Junior
- 4How many Sentinel instances are recommended at minimum?Junior
- 6What is Redis Cluster?Junior
- 7How does Redis Cluster scale horizontally?Junior
- 8What does Redis Cluster consist of?Junior
- 9How are slots distributed among nodes?Junior
- 10What does a replica do in a cluster?Junior