The data dictionary is normally maintained by the database administrator.

Data elements in the database can be modified by changing the data dictionary.

The data dictionary contains the name and description of each data element.

The data dictionary is a tool used exclusively by the database administrator.

Support end users who use English-like commands

Support in the development of complex applications software

Specify the structure of a database.

All of the above.

Data is defined separately and not included in programs

Programs are not dependent on the physical attributes of data.

Programs are not dependent on the logical attributes of data

Both 1) Programs are not dependent on the physical attributes of data. and 2) Programs are not dependent on the logical attributes of data

Dotted rectangle

Diamond

Doubly outlined rectangle

None of these

Network Model

Hierarchical Model

Relational Model

None of these