Data and Database Administration
Which of the following could cause data to be unavailable?

Planned database maintenance activities
Data becoming lost or inaccurate
The database server
All of these

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Data and Database Administration
Backward recovery is which of the following?

Where the after-images and before-images are applied to the database
Where the after-images are applied to the database
Where the before-images are applied to the database
Switching to an existing copy of the database

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Data and Database Administration
Performance analysis and tuning is which of the following?

Undertaken one time at the time of the implementation of a new application
Undertaken as an ongoing part of the backup of a database
Undertaken as an ongoing part of managing a database
Undertaken one time at the time of a DBMS installation

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