AP CSA Unit 9 - Inheritance

Consider the code provided.

• airLevel = 0; needs to use the this keyword. Like so, this.airLevel = 0;

• Java interfaces must not include any implementation logic.

• All of the method declarations should be private.

• All of the methods must include their implementation logic.

• Interface methods can not return void.

If more than one class implements an interface, its methods are ____.

• aggregated
• public
• dependent
• polymorphic

What happens if a variable or method is made private?

• It can be accessed by any class inherited from the current class
• It can be accessed from another object unrelated to the current one.
• It cannot be accessed by an unrelated object from the outside.
• It cannot be accessed by anything

 What does Encapsulation mean?

• Classes share stuff with subclasses
• Grouping fields and member functions together
• Making an object from a class

What is this?

• Variable
• Constructor
• Field

What are these?

• Getter and setter methods
• Constructors
• Fields

An object is an _________ of a class.

• iteration
• inheritance
• instance

How do you make an instance of the Animal class?

• Animal anim = new Animal();
• Animal = new Animal();
• Animal anim = new Animal;

Which of the following is a valid declaration of an object of class Func?

• Func obj = new Func();

• Func obj = new Func;

• obj = new Func();

• new Func obj;

A class constructor must be declared as

• public

• protected

• private

• none of these