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Aporeon

Technical interview practice, from one developer to another.

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Distributed Caching & Redis

Cache Fundamentals

In-memory versus distributed cache, cache-aside, TTLs, invalidation, key scope, stale data, and response caching.

7 drillsPractice one at a timeOrdered pathComparison questionConcept question

Recommended start

Memory vs Distributed

Explains when local process memory is enough and when shared Redis-style caching is worth the extra dependency.

Easy~5 minStep 1 of 7

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7 of 7 shown

1Memory vs DistributedRecommended startExplains when local process memory is enough and when shared Redis-style caching is worth the extra dependency.Comparison questionEasy~5 min.NETASP.NET CoreRedisPractice 2Cache-aside ReadsExplains the cache-aside pattern for read-heavy endpoints and how misses, TTLs, and source-of-truth reads fit together.Concept questionEasy~5 min.NETASP.NET CoreRedisPractice 3TTL StrategyExplains how TTL choices balance freshness, load reduction, user expectations, and operational safety.Concept questionEasy~5 min.NETASP.NET CoreRedisPractice 4InvalidationExplains delete-on-write, versioned keys, event-driven invalidation, and the race conditions around cache freshness.Concept questionMedium~7 min.NETASP.NET CoreRedisPractice 5Scoped Cache KeysExplains cache-key scope for tenant, user, role, locale, filters, response version, and security-sensitive reads.Concept questionMedium~7 min.NETASP.NET CoreRedisPractice 6Stale DataExplains when stale cache reads are acceptable, when they are dangerous, and how to make freshness visible.Concept questionMedium~7 min.NETASP.NET CoreRedisPractice 7Response vs ObjectCompares caching response-shaped read models with caching domain entities or raw database objects.Comparison questionMedium~7 min.NETASP.NET CoreRedisPractice

Practice order

7 drillsOne at a time

1Memory vs DistributedUp next / Easy / ~5 min
2Cache-aside ReadsEasy / ~5 min
3TTL StrategyEasy / ~5 min
4InvalidationMedium / ~7 min
5Scoped Cache KeysMedium / ~7 min
6Stale DataMedium / ~7 min
7Response vs ObjectMedium / ~7 min