EXAMIANS
Data replication is favored where most process requests are read-only and where the data are relatively static.
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In a semijoin, only the joining attribute is sent from one site to another, and then only the required rows are returned.
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A distributed database has which of the following advantages over a centralized database?
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The semijoin approach saves network traffic.
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Replication may use either synchronous or asynchronous distributed database technologies, although asynchronous technologies are more typical in a replicated environment.
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A homogenous distributed database is which of the following?
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The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.
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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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Which of the following is not one of the stages in the evolution of distributed DBMS?
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A distributed database can use which of the following strategies?
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