A database administrator is responsible for:

A. defining data ownership.

B. establishing operational standards for the data dictionary.

C. creating the logical and physical database.

D. establishing ground rules for ensuring data integrity and security.

Explanation:

A database administrator is responsible for creating and controlling the logical and physical database. Defining data ownership resides with the head of the user department or top management if the data is common to the organization. IS management and the data administrator are responsible for establishing operational standards for the data dictionary. Establishing ground rules for ensuring data integrity and security in line with the corporate security policy is a function of the security administrator.