单项选择题

Given：

Which statement is true about the class of an object that can reference the variable base？（）

A.It can be any class.
B.No class has access to base.
C.The class must belong to the geometry package.
D.The class must be a subclass of the class Hypotenuse.

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单项选择题

Given： What is the result？（）

A.Hello
B.Hello World
C.Compilation fails.
D.Hello World 5
E.The code runs with no output.

多项选择题

Whichfourstatementsaretrue？（）

A.Has-a relationships should never be encapsulated.
B.Has-a relationships should be implemented using inheritance.
C.Has-a relationships can be implemented using instance variables.
D.Is-a relationships can be implemented using the extends keyword.
E.Is-a relationships can be implemented using the implements keyword.
F.An array or a collection can be used to implement a one-to-many has-a relationship.

Given： Which statement is true about the class of an object that can reference the variable base？（）

Given：

Which statement is true about the class of an object that can reference the variable base？（）