QUESTION 1

1. Below is the incomplete code for a "Rat" class that extends the Pet class used in the previous Lab. From the choices below, choose the most appropriate option for a method that could be added to this class

   

   a		void run() { System.out.println(name+": is running..."); }
   b		void bark() { System.out.println("Woof woof!"); }
   c		void eyes() { System.out.println("Eyes are: "+eyecolour); }

QUESTION 2

1. Below is the incomplete code for a "Rat" class. Choose the correct code for its overloaded constructor.

   a		Rat(String name, String colour, int weight, String eyecolour, boolean hasRabies){ super(name, colour, weight); this.eyecolour = eyecolour; this.hasRabies = hasRabies; }
   b		Rat(String name, String colour, int weight){ super(name, colour, weight); }
   c		Rat(){ super(); eyecolour = "Pink"; hasRabies = true; }
   d		Rat(String eyecolour, boolean hasRabies){ this.eyecolour = eyecolour; this.hasRabies = hasRabies; }

QUESTION 3

1. For the Pet and Cat classes from the previous Lab, which statement below is correct?

   	a	To create an instance of the Cat class, you can only use the overloaded constructor
   	b	For a Cat object to have a 'name', you need to add a new data field called 'name' to the Cat class definition
   	c	An instance of the Cat class can be created even if the Pet class is deleted (not defined)
   	d	Creating an instance of Cat class using the default constructor will also invoke the default constructor of the Pet class

QUESTION 4

1. For the Pet and Cat classes from the previous Lab, which statement below is correct?

   a		The Pet class extends the Cat class
   b		An instance of the Pet class cannot be declared on its own, only a 'Cat' object can be created
   c		The sleep() method is not inherited by the Cat class
   d		The Pet class is a superclass and the Cat class is a subclass

QUESTION 5

1. Inheritance is important in Object Oriented Programming because:

   	a	It is not possible to create Object Oriented Programs without using inheritance
   	b	It reduces the amount of planning and design required in a program
   	c	It minimizes duplication of code when creating multiple related classes

QUESTION 6

1. True or False: multiple subclasses can extend from the the same superclass

   True

   False

QUESTION 7

1. Using the Pet and Cat classes from the previous Lab as a reference, which line of code properly creates a new instance of the Cat class?

   a		Pet myCat = new Pet("Bob", "Orange", 8, true, "medium");
   b		Cat myCat = new Cat("Bob", "Orange", 8, "medium", true);
   c		Cat myCat = new Cat("Bob");
   d		Cat myCat = new Cat("Bob", "Orange", 8, true, "medium");

QUESTION 8

1. Which statement is false?

   	a	"class A extends B" means B is a subclass of A.
   	b	"class A extends B" means A is a subclass of B.
   	c	When an instance of a subclass is created, the superclass constructor (default or overloaded) is also invoked
   	d	A subclass usually has more datafields and methods than its superclass

class Rat extends Pet{ private String eyecolour; private boolean hasRabies; //Rest of class definition is missing class Rat extends Pet{ private String eyecolour; private boolean hasRabies; //Rest of class definition is missing