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

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

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

The application's data can be somewhat out-of-date.
All of these
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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