Question 11 :
An attribute that names or identifies entity instances is a(n):
Question 12 :
Properties that describe the characteristics of entities are called:
Question 13 :
In which of the following can many entity instances of one type be related to many entity instances of another type?
Question 14 :
Entities of a given type are grouped into a(n):
Question 15 :
Which of the following is NOT a basic element of all versions of the E-R model?