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.
Answer: B
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Which of the following is true concerning a global transaction?
Answer: B
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With failure transparency, all of the actions of a transaction are committed or none of them are committed.
Answer: A
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The problem of concurrency control is more complex in a distributed database.
Answer: A
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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.
Answer: A
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The purpose of timestamping is to avoid the use of locks.
Answer: A
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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.
Answer: B
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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.
Answer: A
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A transaction manager is which of the following?
Answer: D
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Location transparency allows for which of the following?
Answer: D
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