Inheritance question

[Chandra Bhatt]

Question 16
 
class Leg{}
class Fur{}
abstract class Pet {
  public abstract void eat();
  public abstract void sleep();
}
class Dog extends Pet {
  Leg leftFront = new Leg(), rightFront = new Leg();
  Leg leftRear = new Leg(), rightRear = new Leg();
  Fur fur = new Fur();
  public Fur shed() {return fur;}
  public void eat() {}
  public void sleep() {}
}
class Cat extends Dog {
  public void ignoreOwner() {}
  public void climbTree() {}
}
 
Which of the following statements is not a true statement?
a. A Cat object inherits an instance of Fur and four instances of Leg from the Dog superclass.
b. A Cat object is able to sleep and eat.
c. A Cat object is able to climb a tree.
d. The relationship between Dog and Pet is an example of an appropriate use of inheritance.
e. The relationship between Cat and Dog is an example of an appropriate use of inheritance.
f. None of the above.

I see "f" as its answer! But the source of the question says "e".
What is called appropriate use of Inheritance?


Help will be appreciated!


SOURCE: Danchisholms mock

Thanks,
cmbhatt
[ April 25, 2007: Message edited by: Chandra Bhatt ]

[Tina Tibrewal]

May be its an inappropriate because a cat is not a dog
But not going by class names I too would have gone for none of the above.