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Exam 12: Distributed Database Management Systems

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Question 41

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In a distributed database management system (DDBMS),control is used to manage simultaneous data access and ensure data consistency across database fragments.

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Question 42

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Distributed database systems do not require complex mechanisms to manage transactions and ensure the database's consistency and integrity.

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Question 43

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In a distributed database management system (DDBMS),occurs to determine the data location of local and remote fragments.

transparency exists when the end user or programmer must specify the database fragment names but does not need to specify where these fragments are located.

In a basic distributed processing environment,the distributed processing system shares the database chores among three sites connected through a .

A database management system needs to prepare the data for presentation to the end user or to an application program.

The objective of optimization is to minimize the total cost associated with the execution of a request.

describes the process of deciding where to locate data

Current distributed database management system (DDBMS)are subject to some problems,such as the complexity of management and control

A centralized database management is subject to a problem such as____________

A distributed database management system (DDBMS)must be communications-media-dependent.

Performance transparency ensures that the system finds the most cost-effective path to access remote data.