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Exam 12: Distributed Database Management Systems

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Question 21

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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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multiple-site proces...

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Question 22

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The ____________________ fragment condition indicates that each row is unique,regardless of the fragment in which it is located.

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Question 23

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

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

If a DDBMS exhibits ____________________ transparency,the user does not need to know that the data are partitioned-meaning the table's rows and columns are split vertically or horizontally and stored among multiple sites.

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

One of the advantages of a DDBMS is processor ____________________.

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

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

____ transparency ensures that the system will continue to operate in the event of a node failure.

____ 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.

What is transaction transparency? What are some of the basic concepts that you should know to understand how transactions are managed in a DDBMS?

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

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

Describe performance transparency and heterogeneity transparency.

____ are an advantage of a DDBMS.

____ is a disadvantage of a DDBMS.

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

A DDBMS must be communications-media-dependent.

____ distributed database systems integrate only one type of centralized DBMS over a network.