You are given an E-R diagram with two entities,ORDER and CUSTOMER,as shown above.What does the symbol next to the CUSTOMER entity indicate?
A)A maximum cardinality of "zero"
B)A maximum cardinality of "one"
C)A minimum cardinality of "optional"
D)A minimum cardinality of "required"
E)None of the above.

Question

Quizplus · Accepted Answer

The symbol next to the CUSTOMER entity indicates a minimum cardinality of "required", meaning that every order must be associated with at least one customer. Therefore, option D (a minimum cardinality of "required") is the best choice.

You Are Given an E-R Diagram with Two Entities,ORDER and CUSTOMER,as