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Strong consistency in a storage system means that

  • A.reads may return stale data for a time
  • B.writes are never lost under any condition
  • C.the data is replicated three times over
  • D.a read after a write returns the new value

Answer: D

Eventual consistency permits a window in which a read may see older data. Modern object stores mostly offer strong consistency, which removed a long standing source of application bugs. Eventual consistency allowed a stale window.

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