Data and Database Administration
Which of the following is true concerning open-source DBMS?

Is free or nearly free database software whose source code is publicly available
Is not competitive against PC-oriented packages and is fully SQL compliant
Is free or nearly free database software whose source code is not publicly available
Is competitive against PC-oriented packages and is not fully SQL compliant

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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 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

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