EXAMIANS
Data replication is favored where most process requests are read-only and where the data are relatively static.
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Synchronization for pull replication is less disruptive and occurs only when needed by each site, not when a central master site thinks it is best to update.
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A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations.
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A transaction manager is which of the following?
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Storing a separate copy of the database at multiple locations is which of the following?
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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.
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Which of the following is not one of the stages in the evolution of distributed DBMS?
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Some of the columns of a relation are at different sites is which of the following?
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With asynchronous technology, if any copy of a data item is updated anywhere on the network, the same update is immediately applied to all other copies or it is aborted.
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Databases that are stored on computers at multiple locations and are not interconnected by a network are known as distributed databases.
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