System Design – Caching Layers
Practice system design interview questions focused on caching layers. Cover browser, CDN, application, and database caches. Answer questions and receive feedback on trade-offs and placement. Ideal for software engineer system design prep. First 2 questions are free with full feedback.
- Level Intermediate
- Questions 12
Try any track free — first 2 questions include full AI feedback. Subscribe to finish the track and unlock everything. Type or speak your answer — the first 2 questions include scoring and detailed AI feedback.
Sample system design – caching layers interview questions
Preview 6 questions from this track in quiz order. In the full quiz you answer one at a time — type or speak — then get a score and feedback.
-
What are common caching layers in a web system?
What a strong answer includes
Browser, CDN, application, and database.
-
When would you use a CDN cache?
What a strong answer includes
Static assets or public content.
-
What is an application-level cache?
What a strong answer includes
In-memory cache like Redis near the app.
-
How do you decide what to cache?
What a strong answer includes
Frequently read, rarely changing data.
-
What is cache invalidation?
What a strong answer includes
Removing or updating stale cached data.
-
Explain the trade-off of caching at the browser vs CDN.
What a strong answer includes
Browser is per user; CDN is shared.