what is run time polymorphism

Answer Posted / shiry

In C++ ;
if i have 2 clases
class A {

int x();
}
class B : public A {

int x();
}
void main(){

A* a = new B() ;
a.x(); // it will call the method of the super class A
// not B but in java it will call the method in the
// child B why ??

}

Is This Answer Correct ?    0 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

When should the method invokelater() be used?

590


Explain an algorithm to find depth of a binary tree.

558


Explain runtime exceptions?

751


What is data object example?

540


What happens if we override only equals?

587






What is the difference between normal report & matrix report?

575


What are implicit objects in java?

555


Explain the meaning of java applet.

610


What is var keyword ?

742


What is anti pattern in programming?

505


How do you create a bulleted list?

574


Say you want to store the information about a number of pets in an array. Typical information that you could store for each pet (where relevant) would be • Breed of animal • Animal's name • Its birth date • Its sex • Whether it has been sterilised or not • When it is due for its next inoculation • When it last had its wings clipped For each type of pet (eg. dog, cat or bird) you would typically define a class to hold the relevant data. Note: You do not need to implement these classes. Just answer the following questions. 3.1.1 What would be the advantage of creating a superclass (eg. Pet) and declaring an array of Pet objects over simply using an array of Objects, storing each of the instances of the different pet classes (eg. Dog, Cat or Bird) in it? 3.1.2 Would you define Pet as a class or as an interface? Why? (2) (2)

1354


Define an applet in java?

637


What is the difference between a local variable and an instance variable?

556


Explain some best practices you would apply while using collection in java?

576