Distributed Systems Quiz

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Questions and Answers

哪个定理阐述了网络服务无法同时实现一致性、可用性和分区容错性?

  • CAP定理 (correct)
  • AC定理
  • AP定理
  • PC定理

机械硬盘的顺序读/写速度大约比随机读/写性能快多少倍?

  • 50倍
  • 200倍
  • 10倍
  • 100倍 (correct)

哪种数据库优先考虑性能而非一致性?

  • 所有数据库都优先考虑一致性
  • AP数据库 (correct)
  • CA数据库
  • CP数据库

为了提高性能效率,随机读/写应该转换成什么?

<p>顺序读/写 (D)</p> Signup and view all the answers

分布式系统需要考虑哪些因素才能确保系统的一致性和可用性?

<p>网络超时和高度容错的解决方案 (A)</p> Signup and view all the answers

使用什么作为主键是推荐的?

<p>数据库自增ID (B)</p> Signup and view all the answers

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Study Notes

  • Data consistency in distributed systems is more complex due to lack of shared memory and global clock.
  • Network timeouts in distributed systems require highly fault-tolerant solutions.
  • CAP theorem states that network services cannot simultaneously achieve consistency, availability, and partition tolerance.
  • Databases can be categorized into CA, CP, and AP based on their ability to achieve consistency, availability, and partition tolerance.
  • CA databases are single-node clusters with limited partition tolerance.
  • CP databases prioritize consistency and partition tolerance over performance.
  • AP databases prioritize availability and partition tolerance over data consistency.
  • CAP theorem presents a trade-off between consistency, availability, and partition tolerance.
  • Distributed systems require careful consideration of data consistency and system availability.
  • Distributed systems can be challenging to design and maintain due to their complex nature.

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