Exam 10: Distributed Databases

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____ transparency allows the system to perform as if it were a centralized database management system.

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Both distributed processing and distributed databases require a network to connect all components.

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A fully distributed 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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____________________ management ensures that data move from one consistent state to another, including synchronization of local and remote transactions.

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The ____ scenario describes a fully distributed DBMS with support for multiple data processors and transaction processors at multiple sites.

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____ are an advantage of a DDBMS.

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A ____ distributed database system will support different DBMSs that may even support different models running under different computer systems.

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In order to manage distributed data, copies or parts of the database processing functions must be distributed to all data storage sites.

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____ is the delay imposed by the amount of time required for a data packet to make a round trip from point A to point B.

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In a DDBMS, ____________________ occurs to determine the data location of local and remote fragments.

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In a DDBMS, ____________________ control is used to manage simultaneous data access and ensure data consistency across database fragments.

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One of the advantages of a DDBMS is growth facilitation.

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Under the ____ scenario, multiple processes run on different computers sharing a single data repository.

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Describe performance transparency and heterogeneity transparency.

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

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The TP is the software component found in each computer that requests data.

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____ 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.

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A distributed database system requires functional characteristics that can be grouped and described as transparency features.

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____ fragmentation refers to the division of a relation into attribute subsets.

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One of the advantages of a DDBMS is ____________________ operating cost.

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