Which of the following centrally controls the database and manages different aspects of the data?
A.
Data storage
B.
The database
C.
A data dictionary
D.
Access control
Explanation:
C: A data dictionary holds the schema information about the database. This schema information is represented as metadata. When the database administrator modifies the database attributes, she is modifying the data dictionary because it is the central component that holds this type of information. When a user attempts to access the database, the data dictionary will be consulted to see if this activity is deemed appropriate.
A data dictionary holds the schema information about the database. This schema information is represented as metadata. When the database administrator modifies the database attributes, she is modifying the data dictionary because it is the central component that holds this type of information. When a user attempts to access the database, the data dictionary will be consulted to see if this activity is deemed appropriate.
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