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
Which of the following is a disadvantage of replication?

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

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

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The application's data can be somewhat out-of-date.

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

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

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