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Explain how you would implement a caching mechanism for frequently accessed video metadata.

General/Othermedium0.3 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Disney+ Hotstar
Key Concepts Tested
partition
Expert AnswerPremium
67 wordsInterview-ready
**Why Cache**: Video metadata (title, duration, thumbnail) is read-heavy; DB would bottleneck at scale. **Design**: (1) Multi-tier—Redis/Memcached for hot keys; TTL 1-24h; (2) Cache-aside—check cache, on miss load from DB, populate; (3) Invalidation—on update, invalidate/update entry; (4) Warming—preload popular during low traffic; (5) Partition by content_id for Disney+ scale. **Cost**: Reduces DB load; Redis cost vs. DB cost....
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