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.
-Which of the following is true according to the ZYX Company ER diagram?
A)An employee can sign up many customers and he or she has to sign up at least one customer
B)An employee can sign up many customers but he or she does not have to sign up any customers
C)Each employee signs up exactly one customer
D)Each employee signs up many 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.
-Which of the following is true according to the ZYX Company ER diagram?
A)An employee can sign up many customers and he or she has to sign up at least one customer 
B)An employee can sign up many customers but he or she does not have to sign up any customers 
C)Each employee signs up exactly one customer 
D)Each employee signs up many customers

Quizplus · Accepted Answer

According to the ER diagram, there is a many-to-many relationship between employees and customers, which means an employee can sign up many customers and a customer can be signed up by many employees. The participation constraint is optional on the customer side, which means an employee does not have to sign up any customers. So, option B is true.

ZYX COMPANY Observe the ER Diagram for the ZYX COMPANY