A company holds information about 1000 customers. It receives, on average, 50 orders per day. Each order must be placed by only one customer. Customers must have placed at least one order but may place several. An analyst has shown an association between the classes Customer and Order. What multiplicities should she show at the Order end of this association?
A) 0..*.
B) 1.*.
C) 0..50.
D) 1..1000.

Question

Quizplus · Accepted Answer

Since each order must be placed by only one customer and all customers must have placed at least one order, the multiplicities should be 1.* at the Order end of the association. The option A (0..*.) is not correct since every order has to be placed by one customer. Option C (0..50.) limits the number of orders, but there is no such limit mentioned in the problem. Option D (1..1000.) is not correct since a customer can place more than one order.

A Company Holds Information About 1000 Customers