System Design – Consistent Hashing
Practice system design interview questions focused on consistent hashing. Cover how it distributes data, handles node changes, and reduces remapping. Answer questions and receive feedback on clarity and trade-offs. 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 – consistent hashing 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 consistent hashing?
What a strong answer includes
Distributes keys across nodes with minimal remapping when nodes change.
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Why is consistent hashing useful in distributed systems?
What a strong answer includes
Adding or removing nodes affects only a small portion of keys.
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How does a basic hash ring work?
What a strong answer includes
Nodes and keys are placed on a circle; keys map to the next node.
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What problem does consistent hashing solve compared to simple modulo hashing?
What a strong answer includes
Modulo causes most keys to remap when node count changes.
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What are virtual nodes?
What a strong answer includes
Multiple points per physical node for better balance.
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How do you handle a node failure in consistent hashing?
What a strong answer includes
Keys move to the next node on the ring.