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Oops Concepts-Urgent

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Hi All,
I want a clear concepts of OOPs
i want example codings for each concepts....

Interview type of explanation is best for me.


Please tell me .....Urgent

share ur interview oops concepts

Thanks in advance

MoorthyP


Comments

Author: srinivas17 Feb 2006 Member Level: Gold   Points : 2

Concepts of OOP:
o Objects
o Classes
o Data Abstraction and Encapsulation
o Inheritance
o Polymorphism
Briefly on Concepts:

Objects

Objects are the basic run-time entities in an object-oriented system. Programming problem is analyzed in terms of objects and nature of communication between them. When a program is executed, objects interact with each other by sending messages. Different objects can also interact with each other without knowing the details of their data or code.

Classes

A class is a collection of objects of similar type. Once a class is defined, any number of objects can be created which belong to that class.

Data abstraction and Encapsulation

Abstraction refers to the act of representing essential features without including the background details or explanations. Classes use the concept of abstraction and are defined as a list of abstract attributes.

Storing data and functions in a single unit (class) is encapsulation. Data cannot be accessible to the outside world and only those functions which are stored in the class can access it.

Inheritance

Inheritance is the process by which objects can acquire the properties of objects of other class. In OOP, inheritance provides reusability, like, adding additional features to an existing class without modifying it. This is achieved by deriving a new class from the existing one. The new class will have combined features of both the classes.

Polymorphism

Polymorphism means the ability to take more than one form. An operation may exhibit different behaviors in different instances. The behavior depends on the data types used in the operation. Polymorphism is extensively used in implementing Inheritance.

Advantages of OOP

Object-Oriented Programming has the following advantages over conventional approaches:
o OOP provides a clear modular structure for programs which makes it good for defining abstract datatypes where implementation details are hidden and the unit has a clearly defined interface.
o OOP makes it easy to maintain and modify existing code as new objects can be created with small differences to existing ones.
o OOP provides a good framework for code libraries where supplied software components can be easily adapted and modified by the programmer. This is particularly useful for developing graphical user interfaces.

Author: HimaBindu Vejella07 Jun 2006 Member Level: Gold   Points : 2

http://www.developer.com/design/article.php/10925_3317571_3

Author: DotNetGuts (DNG)24 Aug 2006 Member Level: Gold   Points : 2

http://www.dotnetspider.com/profiles/ProfileArticles.aspx?userId=CodeGuruDotNet

Author: ashutosh04 Jun 2007 Member Level: Bronze   Points : 2

wat is static constractor.

Author: Preet Maan05 Jul 2007 Member Level: Bronze   Points : 2

For basic oops concepts you can visit

http://www.dotnetinterviewfaqs.com/oops-object-oriented-programming-concepts-faqs-job-interview-questions-answers.aspx

Author: Sunku.VamsiKrishna16 Jun 2008 Member Level: Bronze   Points : 2

http://www.c-sharpcorner.com/UploadFile/eecabral/OOPSand.NET111102005065802AM/OOPSand.NET1.aspx
http://www.dotnettreats.com/tipstricks/oopconcepts2.aspx
http://www.developer.com/net/csharp/article.php/1465681

Author: Ultimaterengan20 Aug 2008 Member Level: Gold   Points : 2

hi,

OOPs stands for object oriented programming system.the programming language relates to the use of c++ and Java.
OOP is object oriented programming language which is extension of procedure oriented programming language.
OOP is reduce the code of the program because extensive feature of polymorphism.
It have many properties:-
1)Inheritance
2)Data Abstraction
3)Data Encapsulation
4)Polymorphism
5)Data Hiding

Inheritane is Parent class(super class) variable and methods use in child class(sub Class).

i hope this may help u

Author: RobinHood20 Aug 2008 Member Level: Gold   Points : 5

OOP is defined as object oriented programming.
Basic Concepts of OOP..
1)Class
2)Object
3)Method
4)Inheritance
5)Abstraction
6)Encapsulation
7)Polymorphism
8)Message passing

For More Details..
http://en.wikipedia.org/wiki/Object-oriented_programming
http://www.webopedia.com/TERM/O/object_oriented_programming_OOP.html
http://searchsoa.techtarget.com/sDefinition/0,,sid26_gci212681,00.html