1. The identifier of the entry becomes the____of the corresponding table. primary key foreign key
supertype subtype either A or B. In crow's foot style E-R diagrams, a circle across the
relationship line near on entity indicates: a minimum cardinality of zero. a minimum cardinality
of one. a maximum cardinality of one. a maximum cardinality of many. Both B and C Given
only the following excerpt of an E-R model:
Solution
20) ALL OF THE ABOVE
21) B. TRUE
22 E . ALL THE ABOVE
primary key IS
It is a unique.
Used to represent rows in relationships
Can be candidate key
Used to identify unique rows
23) D. Relational database stores data in the form of TABLE
24 ) E NEITHEIR ONE OF THE ABOVE
When the primary key of one relation is placed into a second relation, it is called a foreign
key
25) D. ALL THE ABOVE
26B) FALSE