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Distributed Databases

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

True
False

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

False
True

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Distributed Databases
Which of the following is not one of the stages in the evolution of distributed DBMS?

Unit of work
Remote unit of work
Distributed unit of Work
Distributed request

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Distributed Databases
Asynchronous technology can result in unsatisfactorily slow response time because the distributed DBMS is spending considerable time checking that an update is accurately and completely propagated across the network.

True
False

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Distributed Databases
A distributed database has which of the following advantages over a centralized database?

Slow Response
Software complexity
Modular growth
Software cost

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

True
False

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