Test8：对象之间one-to-many关系测试题

问题 1
A collection typically models a _____ relationship.
A. many-to-many
B. zero-to-one
C. one-to-many
D. one-to-one
答案：
C

问题 2
Consider the following method call, where c is an instance of the class java.util.ArrayList.

c.size();  

This method call returns the number of
A. times that the method c.add has been called
B. elements in the ArrayList represented by c
C. ArrayList objects that have been instantiated
D. bytes used by c
答案：
B

问题 3
请看下图：