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Interview quiz track

First 2 free Intermediate System Design

Full Stack Engineer Interview

Practice interview questions for full stack engineer roles. Cover frontend and backend fundamentals, API design, databases, and end-to-end thinking. Answer questions and receive feedback. Ideal for full stack interview prep. First 2 questions are free with full feedback.

  • Level Intermediate
  • Questions 12
  • full stack
  • engineer
  • role

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Full Stack Engineer Interview interview questions

All 12 questions on this track, in the order you answer them. In the quiz you answer one at a time — type or speak — then get a score and feedback.

  1. How would you design a simple CRUD application end to end?

    What a strong answer includes

    Frontend, API, and database.

  2. What is the difference between client-side and server-side rendering?

    What a strong answer includes

    Trade-offs.

  3. How do you handle authentication across frontend and backend?

    What a strong answer includes

    Tokens or sessions.

  4. Describe a full stack feature you built.

    What a strong answer includes

    Architecture and challenges.

  5. How do you optimize a slow page that involves both frontend and backend?

    What a strong answer includes

    Identify bottlenecks.

  6. What database would you choose for a new app and why?

    What a strong answer includes

    Requirements and trade-offs.

  7. How do you structure a REST API for a frontend?

    What a strong answer includes

    Clear resources and responses.

  8. Explain how you would add real-time updates.

    What a strong answer includes

    WebSockets or polling.

  9. How do you test a full stack feature?

    What a strong answer includes

    Unit, integration, and end-to-end.

  10. Describe a trade-off you made between frontend and backend complexity.

    What a strong answer includes

    Reasoning.

  11. How do you deploy a full stack application?

    What a strong answer includes

    Basic pipeline or hosting.

  12. Tell me about a bug that spanned frontend and backend.

    What a strong answer includes

    How you diagnosed it.