CodeHS 4.12 Inheritance

Why do we like to use classes?

• They let us save the state and behavior of objects

• It's good to be classy

• So we can encapsulate each program in a separate class

• Because it's easier to learn

What is a hierarchy?

• Any group of objects ranked so that every one but the topmost is subordinate to a specified one above it

• A level or rank in an organization

• The bourgeoisie

• The person or organization in charge

What keyword do we use to create a class based on another class?

• extends

• subclass

• superclass

• super

When class Bar is based on class Foo, what do we call Bar?

• subclass

• superclass

• extends

• super

When class Bar is based on class Foo, what do we call Foo?

• subclass

• superclass

• extends

• super

It is possible to create a class that isn't based on any other class.

• true

• false

What does it mean to override a superclass method?

• A method in the subclass has the same signature as one in the superclass, and the subclass method is used

• A method in the subclass has the same signature as one in the superclass, and the superclass method is used

• An instance variable in the subclass has the same signature as one in the superclass, and the subclass instance variable is used

• A instance variable in the subclass has the same signature as one in the superclass, and the superclass instance variable is used