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 not publicly available
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 competitive against PC-oriented packages and is not fully SQL compliant

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

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 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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Data and Database Administration
A data warehouse administrator is concerned with which of the following?

The time to make a decision but not the typical roles of a database administrator
The typical roles of a data administrator and redesigning existing applications
The typical roles of a database administrator and redesigning existing applications
The time to make a decision and the typical roles of a database administrator

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