1. What is an object ?
2. Define a class.
3. What is the difference between an object and a class ?
4. Why a class is called a factory of objects ?
5. What are instances of a class ?
6. What is the meaning of abstraction ?
7. What is the benefit of a class in a program ?
8. Why are the objects are called instances of a class?
9. Give a real world example of abstraction.
Answers
An object is an abstract data type with the addition of polymorphism and inheritance. Rather than structure programs as code and data, an object-oriented system integrates the two using the concept of an "object". An object has state (data) and behavior (code). Objects can correspond to things found in the real world.
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A class is a template for objects. ... A class also describes object behavior. An object is a member or an "instance" of a class. An object has a state in which all of its properties have values that you either explicitly define or that are defined by default settings.
A class is called an object factory because objects are created from a class. An object is an instance of a class. ... In class-based programming, objects are created from classes by subroutines called constructors, and destroyed by destructors
An object is an instance of a class, and may be called a class instance or class object; instantiation is then also known as construction. ... Each realized variation of that object is an instance of its class. That is, it is a member of a given class that has specified values rather than variables.
a general idea not based on any particular real person, thing or situation.
Benefit of a class is that it allows you to put your code in to reusable modules. Objects allow you to create instances of those modules. Inheritance allow you to create child modules which are only slightly different to the parent - but inherit the characteristics of it.
Object:- An object is a real-world entity which have State, behavior, and Identity. i.e. You are the object of class Student. Note:- An object is the example of a class that is going to represent it in the real world that's why it is called as the Instance(or example) of the class.
Another real life example of Abstraction is ATM Machine; All are performing operations on the ATM machine like cash withdrawal, money transfer, retrieve mini-statement…etc. but we can't know internal details about ATM. Note: Data abstraction can be used to provide security for the data from the unauthorized methods
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Answer:
1)An object is an abstract data type with the addition of polymorphism and inheritance. Rather than structure programs as code and data, an object-oriented system integrates the two using the concept of an "object". An object has state (data) and behavior (code). Objects can correspond to things found in the real world.
2)In object-oriented programming , a class is a template definition of the method s and variable s in a particular kind of object . ... Subclasses can also define their own methods and variables that are not part of their superclass. The structure of a class and its subclasses is called the class hierarchy
3)A class is a template for objects. ... A class also describes object behavior. An object is a member or an "instance" of a class. An object has a state in which all of its properties have values that you either explicitly define or that are defined by default settings.
4)A class is called an object factory because objects are created from a class. An object is an instance of a class. ... In class-based programming, objects are created from classes by subroutines called constructors, and destroyed by destructors.
5)An object is an instance of a class, and may be called a class instance or class object; instantiation is then also known as construction. ... Each realized variation of that object is an instance of its class. That is, it is a member of a given class that has specified values rather than variables
6)In object-oriented programming, abstraction is one of three central principles (along with encapsulation and inheritance). Through the process of abstraction, a programmer hides all but the relevant data about an object in order to reduce complexity and increase efficiency.
7)Benefit of a class is that it allows you to put your code in to reusable modules. Objects allow you to create instances of those modules. Inheritance allow you to create child modules which are only slightly different to the parent - but inherit the characteristics of it.
8)Object:- An object is a real-world entity which have State, behavior, and Identity. i.e. You are the object of class Student. Note:- An object is the example of a class that is going to represent it in the real world that's why it is called as the Instance(or example) of the class
9)Another real life example of Abstraction is ATM Machine; All are performing operations on the ATM machine like cash withdrawal, money transfer, retrieve mini-statement…etc. but we can't know internal details about ATM. Note: Data abstraction can be used to provide security for the data from the unauthorized methods.
Explanation:
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