Caching interview question
Your Redis cluster has one shard at 100% CPU while others idle. What's likely and how do you fix it?
The answer is available to members. Create a free account to see every answer, track which questions you're confident about and practise with timed mock interviews.
More most-asked Caching questions
- Explain the main caching patterns: cache-aside, read-through, write-through and write-behind.
- Why is cache invalidation hard, and what strategies help?
- What is a cache stampede (thundering herd) and how do you prevent it?
- How does HTTP caching work (Cache-Control, ETag, CDNs)?
- Explain the difference between cache penetration, cache breakdown and cache avalanche.
- In cache-aside, why can a value be stale even though you delete the key on every write?
- How can a CDN leak one user's data to another, and how do you prevent it?
- Should you invalidate the cache before or after the database commit?