Question

In unit 5 we introduce some of the most important concepts in object oriented programming including class, object, method, attributes, and instantiation. Discuss each of these concepts and how they relate to each other and provide a practical example drawn from your own personal experience.

Please a practical application and explanation will be highly appreciated. I already have the concepts defined. Thanks

Answer 1

Object

Objects are a run-time entity which has real-world existence. It is an executable file which can be run in the computer system. In the above example, apple and grapes are the objects and these objects exist in the real world. The object is created with the help of a class and object of similar type are associated with one class.

Class

A class is nothing but a label attached to the objects of similar type. In other words, we can say that it is a factory to generate objects.

For example:

class Fruit

{

char color[20];

}

The object of this class may be an apple, grapes, banana, etc because all of these objects have some common properties or attribute like each object has its own color, rates per kg, taste, etc.

So, all these objects may be associated with one class.

Method

A method is used to operate the data of a class object. Each object has some data in the form for data member or attributes.

Instantiation

Instantiation is a process which provides a unique identity to the object. It is derived from the instance word. The new instance of a class has its own set of the data member variable.

Attribute

An attribute is the property of an object or it is the data member in a class definition. In the above example, color is the attribute or property of an object and the value of color is attribute value.