Redis & Caching Interview Questions

Data types, eviction policies, persistence (RDB/AOF), Sentinel/Cluster, and caching patterns.

51 questions in this section

Core Data Types (Beginner)
Caching Strategies (Intermediate)
Eviction Policies (Intermediate)
Persistence: RDB vs. AOF (Intermediate)
Transactions & Atomicity (Intermediate)
Pub/Sub Messaging (Beginner)
Sentinel vs. Cluster (Advanced)
Penetration, Breakdown, & Snowslide (Advanced)
Distributed Locking (Redlock) (Advanced)
Pipelining (Intermediate)
Redis Streams (Advanced)
LRU vs LFU in depth (Intermediate)
Lua Scripting (Advanced)
Replication: Master-Slave (Intermediate)
Memory Optimization (Advanced)
Redis Bitmaps (Advanced)
HyperLogLog (Advanced)
Setting Expiry (Beginner)
Redis Info (Beginner)
Runtime Configuration (Intermediate)
Real-time Monitoring (Intermediate)
SCAN over KEYS (Intermediate)
DEL vs. UNLINK (Advanced)
Geospatial Indexing (Intermediate)
Blocking List Pops (Intermediate)
Client Buffers (Advanced)
Max Clients (Beginner)
Redis Slowlog (Intermediate)
Object Encoding (Advanced)
Manual Snapshots (Beginner)
Pipeline vs. MULTI (Advanced)
Hash vs. Individual Keys (Intermediate)
Expire at Timestamp (Beginner)
Client ID (Beginner)
Wiping Data (Beginner)
Multiple Databases (Beginner)
Atomic SET if not exists (Intermediate)
ZSET Range Query (Intermediate)
Script Caching (Advanced)
Pausing Clients (Advanced)
Memory Fragmentation (Advanced)
Client-Side Caching (Redis 6+) (Advanced)
ACLs (Access Control Lists) (Intermediate)
AOF Sync Options (Advanced)
RDB Compression (Intermediate)
Disabling Replies (Advanced)
Data Migration (Intermediate)
Redis VM/Swap (Legacy) (Advanced)
Set Math: Intersection/Union (Beginner)
Popping from Sorted Sets (Intermediate)
LRU Accuracy (Advanced)

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