Exam 12: Distributed Database Management Systems

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Distribution transparency is supported by a distributed data dictionary.

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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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fragmentation refers to the division of a relation into subsets of tuples.

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One of the advantages of a distributed database management system (DDBMS) is less danger of a single- failure.

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The World Wide Web is the repository for distributed data.

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Distributed processing shares a database's logical processing among two or more physically independent sites that are connected through a network.

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A distributed database system will support different database management systems (DBMS) that may even support different models running under different computer systems.

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

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The transaction processor (TP) is the software component found in each computer that requests data.

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A transaction processor is also known as the processor.

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The processor is the software component residing on each computer that stores and retrieves data located at the site.

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Typically, the scenario requires a network file server running conventional applications that are accessed through a network.

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A contains the description of the entire database as seen by the database administrator.

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The rule requires that all copies of data fragments be identical.

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A DDBMS is subject to which of the following restrictions?

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The processor is the software component found in each computer that requests data. It receives and processes the application's data requests.

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Under the scenario, all record- and file-locking activities are performed at the end-user location.

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A fully distributed database management system (DBMS) must perform all the functions of a centralized DBMS, and it must handle all necessary functions imposed by the distribution of data and processing.

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One of the advantages of a distributed database management system (DDBMS) is security.

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The forces the log entry to be written to permanent storage before the actual operation takes place.

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