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 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.

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Distributed Databases
An autonomous homogenous environment is which of the following?

A different DBMS is at each node and a central DBMS coordinates database access.
A different DBMS is at each node and each DBMS works independently.
The same DBMS is at each node and each DBMS works independently.
The same DBMS is at each node and a central DBMS coordinates database access.

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Distributed Databases
Which of the following is true concerning a global transaction?

The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.
The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS.
The required data are at one local site and the distributed DBMS routes requests as necessary.
The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.

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