The Database Environment
A database management system (DBMS) is a:

hardware system used to create, maintain, and provide controlled access to a database.
software system used to create, maintain, and provide controlled access to a database.
software system used to create, maintain, and provide uncontrolled access to a database.
hardware system used to create, maintain, and provide uncontrolled access to a database.

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The Database Environment
An enterprise data model is:

a non-graphical model that shows the all entities for an organization.
a graphical model that shows all entities for an organization.
a non-graphical model that shows the high-level entities for an organization.
a graphical model that shows the high-level entities for an organization.

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