1.Which of these defines HOW behavior is achieved?

a.superclass

b.implentation

c.interface

d.abstract class

e. subclass

2. Which of these is the topmost (root) class within our textbook collection framework?

a.abstractcollection

b.array

c.node

d. arraybag

e. abstractbag

3. Which of these types of items can a bag contain?

a.items of all the same type

b.items of different types

c.all items having different values

d.all of these

e.two different items with the same value