Distributed Databases – True or False

1. With failure transparency, all of the actions of a transaction are committed or none of them are committed.

A. True
B. False

Correct Answer:  A. True

2. Each site (or node) in a distributed system is subject to the same types of failure as in a centralized system.

A. True
B. False

Correct Answer:  A. True

3. Replication may use either synchronous or asynchronous distributed database technologies, although asynchronous technologies are more typical in a replicated environment.

A. True
B. False

Correct Answer:  A. True

4. Synchronization for pull replication is less disruptive and occurs only when needed by each site, not when a central master site thinks it is best to update.

A. True
B. False

Correct Answer:  A. True

5. With asynchronous technology, if any copy of a data item is updated anywhere on the network, the same update is immediately applied to all other copies or it is aborted.

A. True
B. False

Correct Answer:  B. False

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