Data and Database Administration
Which of the following is part of an administrative policy to secure a database?

Limiting particular areas within a building to only authorized people
Authentication policies
Ensure appropriate responses rates are in external maintenance agreements
All of these

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

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

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Data and Database Administration
Concurrency control is important for which of the following reasons?

To ensure data integrity while reading data occurs to the database in a single-user environment
To ensure data integrity when updates occur to the database in a single-user environment
To ensure data integrity while reading data occurs to the database in a multiuser environment
To ensure data integrity when updates occur to the database in a multiuser environment

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