System Design – Horizontal vs Vertical Scaling
Practice system design interview questions focused on scaling. Cover horizontal and vertical scaling, trade-offs, and when to use each. Answer questions and receive feedback on clarity and reasoning. Ideal for software engineer system design prep. First 2 questions are free with full feedback.
- Level Intermediate
- Questions 12
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Sample system design – horizontal vs vertical scaling 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.
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What is vertical scaling?
What a strong answer includes
Adding more power to a single machine.
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What is horizontal scaling?
What a strong answer includes
Adding more machines.
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What are the limits of vertical scaling?
What a strong answer includes
Hardware limits and single point of failure.
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What are the benefits of horizontal scaling?
What a strong answer includes
Better fault tolerance and theoretically unlimited scale.
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When would you choose vertical scaling?
What a strong answer includes
Simple apps or when horizontal is complex.
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What challenges come with horizontal scaling?
What a strong answer includes
Data consistency and distributed complexity.