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Storing a separate copy of the database at multiple locations is which of the following?

  • A.Data Replication
  • B.Horizontal Partitioning
  • C.Vertical Partitioning
  • D.Horizontal and Vertical Partitioning

Answer: A

Correct answer: Data Replication

Replication stores a full copy at each of several sites, so every query can be answered locally and the failure of one site does not stop the others. The cost is keeping the copies consistent, which is why it suits data that is largely read and rarely changed.

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