Java Inheritance

The following Syntax is used for?

class Subclass-name extends Superclass-name

{

//methods and fields

}

• Polymorphism

• Encapsulation

• Inheritance

• None of the above

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

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

A class that is inherited is called a ______ . (Select all correct)

• super class

• sub class

• base class

• parent class

• child class

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();

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 public variables and methods.

• Predator p = new Cat();

  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 parent class can have many child classes

• True

• False

In Java, each child class can have multiple parents.

• True

• False

Which of the following statements would successfully call a superclass constructor?

• superclass();

• super();

• superclass("parameter");

• construct();