ZYX COMPANY
Observe the ER diagram for the ZYX COMPANY:

This ER diagram will be used for the following questions citing ZYX Company ER Diagram.
-Observe the ER diagram for the ZYX Company:
Which of the following is true according to the ZYX Company ER diagram?
A)An employee can serve many customers and he or she has to serve at least one customer
B)An employee can serve one customer or he or she does not have to serve any customers
C)Each employee serves exactly one customer
D)Employees do not serve customers

Question

ZYX COMPANY
Observe the ER diagram for the ZYX COMPANY:
 
This ER diagram will be used for the following questions citing ZYX Company ER Diagram.
-Observe the ER diagram for the ZYX Company:
Which of the following is true according to the ZYX Company ER diagram?
A)An employee can serve many customers and he or she has to serve at least one customer 
B)An employee can serve one customer or he or she does not have to serve any customers 
C)Each employee serves exactly one customer 
D)Employees do not serve customers

Quizplus · Accepted Answer

According to the ER diagram, the "serve" relationship between Employee and Customer is optional and the cardinality is one-to-many. This means that an employee can serve one or many customers, or no customers at all.

ZYX COMPANY Observe the ER Diagram for the ZYX COMPANY