Distributed Databases
A homogenous distributed database is which of the following?

A different DBMS is used at each location and data are not distributed across all nodes.
A different DBMS is used at each location and data are distributed across all nodes.
The same DBMS is used at each location and data are distributed across all nodes.
The same DBMS is used at each location and data are not distributed across all nodes.

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Distributed Databases
A distributed database is which of the following?

A loose collection of file that is limited to one location.
A single logical database that is spread to multiple locations and is interconnected by a network
A single logical database that is limited to one location.
A loose collection of file that is spread to multiple locations and is interconnected by a network

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Distributed Databases
Replication should be used when which of the following exist?

All of these
The application's data can be somewhat out-of-date.
When using many nodes with different operating systems and DBMSs and database designs.
When transmission speeds and capacity in a network prohibit frequent refreshing of large tables.

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Distributed Databases
Which of the following is a disadvantage of replication?

Reduced network traffic
Each transaction may proceed without coordination across the network.
If the database fails at one site, a copy can be located at another site.
Each site must have the same storage capacity.

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