A distributed database is which of the following?
Some of the columns of a relation are at different sites is which of the following?
A distributed database has which of the following advantages over a centralized database?
Data replication is favored where most process requests are read-only and where the data are relatively static.
Databases that are stored on computers at multiple locations and are not interconnected by a network are known as distributed databases.
With failure transparency, all of the actions of a transaction are committed or none of them are committed.
A semijoin is which of the following?
Which of the following is true concerning a global transaction?
A homogenous distributed database is which of the following?
An autonomous homogenous environment is which of the following?
The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.
The semijoin approach saves network traffic.
An increasingly popular option for data distribution as well as for fault tolerance of any database is to store a separate copy of the database at each of two or more sites.
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.
Each site (or node) in a distributed system is subject to the same types of failure as in a centralized system.
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