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.

False
True

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

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The application's data can be somewhat out-of-date.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

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

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

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

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.
The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.

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