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Distributed Databases

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

False
True

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Distributed Databases
Databases that are stored on computers at multiple locations and are not interconnected by a network are known as distributed databases.

True
False

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

Modular growth
Software complexity
Slow Response
Software cost

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

False
True

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Distributed Databases
A distributed database can use which of the following strategies?

Partitioned into segments at different sites
Partially or totally replicated across sites
Totally centralized at one location and accessed by many sites
All of these

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Distributed Databases
Some of the columns of a relation are at different sites is which of the following?

Horizontal and Vertical Partitioning
Data Replication
Vertical Partitioning
Horizontal Partitioning

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