Answer:
(c) the dynamic type of reference will determine which of the methods to call.
Explanation:
Polymorphism in Object Oriented Programming typically means the same method name can cause different actions depending on which object it is invoked on. Polymorphism allows for dynamic binding in that method invocation is not bound to the method definition until the program executes.
So in the case of Animal superclass and Mammal subclass, both having a method called eat() with identical signatures and return types, depending on which reference, the correct method eat() will be called dynamically upon execution.
For example, if we have the following;
================================
<em>Mammal mammal = new Animal();</em>
<em>mammal.eat()</em>
================================
The eat() method that will be called is the one in the Mammal subclass.
However, if we have;
================================
<em>Animal animal = new Animal();</em>
<em>animal.eat()</em>
================================
The eat() method of the Animal superclass will be called.
Answer:
The code to this question can be given as:
Code:
public class Book //define class.
{
private String title, author; //define variable.
Book(String a, String b) //define parameterized constructor.
{
title = a; //holding value.
author = b;
}
public String toString() //string function
{
return title + "\n" + author; //return value.
}
}
Explanation:
In the above java code firstly we declare the class book that name is already given in the question. Then we declare the private variable that datatype is string author and title. Then we declare the parameterized constructor. In the parameterized constructor we use the private variable for hold constructor parameter value. Then we declare the tostring() function in this function we return value of the title and author variable.
Explanation:
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I think the answer is d. Any of these
I hope it's correct^^
B) Plays an object's animation
An animation is a single drawing, cartoon, sketch, etc., but a sequence of animations can create movement, which appears to the viewer as the object or subject in motion.
