题目内容

Databases maximize _; this means .

A. independence; applications cannot access data associated with other applications
B. independence; applications and data are not linked to each other, so all applications are able to access the same data
C. isolation; applications cannot access data associated with other applications
D. isolation; applications and data are not linked to each other, so all applications are able to access the same data

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Each relational database table contains records (listed in _) and attributes (listed in ) .

A. columns; columns
B. columns; rows
C. rows; columns
D. rows; rows

Each characteristic or quality of a particular entity is called a(n) ________.

A. attribute
B. field
C. instance
D. record

The category “student” is a(n) ________.

A. attribute
B. database
C. entity
D. instance

The ________ key is an identifier field that uniquely identifies a record.

A. alien
B. foreign
C. primary
D. secondary