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First 2 free Intermediate System Design

System Design – Caching Strategies

Practice system design interview questions focused on caching strategies. Cover cache-aside, write-through, write-back, and invalidation approaches. 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
  • caching

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Sample system design – caching strategies 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 the cache-aside pattern?

    What a strong answer includes

    Application checks cache first, then loads from database on miss.

  2. Explain write-through caching.

    What a strong answer includes

    Writes go to cache and database together.

  3. What is write-back caching?

    What a strong answer includes

    Writes go to cache first; database is updated later.

  4. What are the trade-offs of write-back caching?

    What a strong answer includes

    Faster writes but risk of data loss.

  5. How do you invalidate a cache entry?

    What a strong answer includes

    TTL, explicit delete, or versioned keys.

  6. When would you use cache-aside vs write-through?

    What a strong answer includes

    Cache-aside for read-heavy; write-through for stronger consistency.