Java Inheritance

If a subclasses overrides a superclass's method, the method is ____.

• aggregated
• public
• dependent
• polymorphic

Inheritance is used when the relationship between two classes is a(n) _______ relationship.

• "HAS-A"
• "PART-OF-A"
• "IS-A"
• inverse

The following Syntax is used for?

class Subclass-name extends Superclass-name

{

//methods and fields

}

• Polymorphism

• Encapsulation

• Inheritance

• None of the above

A class that is inherited is called a ______ .

• superclass

• Subclass

• subsetclass

• Relativeclass

Class Cat extends Animal. Which is NOT a valid declaration?

• Cat x = new Cat();

• Animal X = new Animal();

• Cat x = new Animal();

• Animal x = new Cat();

Class Dog extends the Animal class.

Which IS a valid declaration?

• Dog d = new Animal();

• Animal d = new Dog();

• Animal d = new Animal();

Cat class extends Predator class.

Which of the following must be true?

• A Cat object has access to all Predator variables and methods.

• A Predator object has access to all Cat variables and methods.

• Cat c = new Predator();

  causes an error.

• Predator p = new Cat();

  p has access to Cat methods and uses the Predator implementations.

What does polymorphism mean?

• Changing shapes
• Having many forms
• Being unchangeable
• Easy

Which of these cannot be passed down through inheritance?

• Public variables
• Private variables
• Methods
• Data

In Java, each child class can have only one parent.

• True
• False