Distributed Databases – True or False

11. Data replication is favored where most process requests are read-only and where the data are relatively static.

A. True
B. False

Correct Answer:  A. True

12. The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.

A. True
B. False

Correct Answer:  A. True

13. The semijoin approach saves network traffic.

A. True
B. False

Correct Answer:  A. True

14. In a semijoin, only the joining attribute is sent from one site to another, and then only the required rows are returned.

A. True
B. False

Correct Answer:  A. True

15. The problem of concurrency control is more complex in a distributed database.

A. True
B. False

Correct Answer:  A. True

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