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Level 4 opens after you complete Level 3: pass the cache-restart incident in any one set.
Level 4 builds on it: it assumes you already know caching, hit rates, TTLs and invalidation.
Level 4 opens after you complete Level 3: pass the cache-restart incident in any one set.
Level 4 builds on it: it assumes you already know caching, hit rates, TTLs and invalidation.