Start free

Interview quiz track

First 2 free Intermediate System Design

System Design – CDNs and Caching

Practice system design interview questions focused on CDNs and caching. Cover content delivery, cache layers, invalidation, and reducing latency. Answer questions and receive feedback on trade-offs and clarity. Ideal for software engineer system design prep. First 2 questions are free with full feedback.

  • Level Intermediate
  • Questions 12
  • system design
  • CDN
  • caching
  • interview practice

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.

Try first 2 questions free All tracks

Sample system design – cdns and caching 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.

  1. What is a CDN and why is it used?

    What a strong answer includes

    Delivers content from edge locations closer to users.

  2. What types of content are good candidates for a CDN?

    What a strong answer includes

    Static assets like images, CSS, and JavaScript.

  3. How does a CDN improve performance?

    What a strong answer includes

    Reduces latency and origin server load.

  4. Explain cache invalidation.

    What a strong answer includes

    Removing or updating stale cached content.

  5. What is the difference between a CDN and a reverse proxy cache?

    What a strong answer includes

    CDN is geographically distributed; reverse proxy is typically closer to the origin.

  6. How would you cache API responses?

    What a strong answer includes

    Considers TTL and which endpoints are cacheable.