Exam 7: Dbms Functions

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Timestamping avoids the need to lock rows in the database and eliminates the processing time needed to apply and release locks and to detect and resolve deadlocks.

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Explain how a database is updated using batch processing.

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What technique is used to identify the person who is attempting to access the DBMS?

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____________________ involves maintaining a log of all updates in the database.

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____________________ integrity constraints consist of primary key constraints and foreign key constraints.

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Which of the following is a federal law that sets a national standard to protect an individual's medical records and other personal health information?

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Encryption converts the data in a database to a format that is indecipherable to unauthorized users who attempt to bypass the DBMS.

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When a DBMS uses journaling, the update log is part of the same file in which the database is stored.

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In two-phase locking, the second phase is where the DBMS releases all locks and acquires no new locks.

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_________________________ allows users at different sites to use and modify copies of a database and then share their changes with the other users.

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Which of the following is an authentication method in which information used to identify a user is stored on a plastic card?

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____________________ is the prevention of unauthorized access, either intentional or accidental.

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Which process returns the database to a state that is known to be correct?

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In Microsoft Access, what do you need to decrypt an encrypted database?

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Which type of data integrity constraint states that the value entered for any field should be consistent with the data type for that field?

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A DBMS provides a number of ____________________ services that assist in the general maintenance of the database.

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What occurs when two or more users are waiting for the other user to release a lock before their transaction can proceed?

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What is data replication? Describe how replication can lead to more efficient database processing.

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Which property of a DBMS lets you change the database structure without requiring you to change the programs that access the database?

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What does a DBMS do to break a deadlock?

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