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OOPs INTERVIEW QUESTIONS & ANSWERS

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1. What is Object Oriented Programming?
  Object Oriented Programming is a Style of programming that represents a program as a system of objects and enables code-reuse.
  Posted by Rajareddy. (Mar 18, 2014)
 

Oops is a concept or methodology which is use to write computer programes by using class and object.

  Posted by Priya Chaudhary. (Feb 12, 2014)
 

Oops stands for object oriented programming its a example of programming language which deals with, object and its interaction to develop computer Applications and program.

  Posted by Naveen Kumar. (Jan 21, 2014)
 

Object Oriented Programming System is a mechanism to write a computer program by using class and Object.
The Object Oriented Programming System is providing 4 principles like

1. Encapsulation
2. Abstraction
3. Polymorphism
4. Inheritance

  Posted by Muhammad Nadeem. (Nov 25, 2013)
 

OOP is just concept that deal four principle....inheritance, polymorphism , interface, Encapsulation and i add some one more in it class, object and method ... oop make your program easy you easily use object from one to other side .

  Posted by Bhanu Pratap Yadav. (Sep 19, 2013)
 

It is a not programing language but it is a concept that deals with Four Principles. 1- Abstraction 2- Encapsulation 3-Inheritance 4-Polymorphism.

  Posted by Bala. (June 13, 2013)
 

Object Oriented Programming is a type of methodology used for building of software application. Object Oriented programming consists of objects, classes, methods.

  Posted by Ashish. (May 20, 2013)
 

OOPS is the Object Oriented Programming Language, basically it connects object to the real world entity. It’s depends on 4 types.
1. Abstraction 2. Polymorphism 3. Encapsulation 4. Inheritence.

  Posted by Nagulu. (May 14, 2013)
 

It is platform independent if you can run. Run the other syatems you can implements esaly.

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2. What are class access modifiers?
 
    Access modifiers are keywords used to specify the declared accessibility of a member or a type. This section introduces the four access modifiers :
  • Public
  • Protected
  • Internal
  • Protected inertnal
  • Private
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3. What is a class?
 
  • Class is concrete representation of an entity.
  • It represents a group of objects, which hold similar attributes and behavior.
  • It provides Abstraction and Encapsulations.
  Posted by Manmohan Singh. (Aug 02, 2014)
 

Class is a key word to create an User defined data type. Every language have data type like int,float etc, but we can’t do all the work by these data types so we need some data type for user requirement that’s why we are creating class.

  Posted by Niranjan. (Apr 14, 2014)
 

Class is a blue print of an object, which describes property of an object.

  Posted by Rajareddy. (Mar 18, 2014)
 

Class is a user define references type data type which consists of variable and methods. We can achieve Encapsulation by using class keyword.

  Posted by Hari. (Jan 31, 2014)
 

Class is a blueprint/model that describes the details of an object

  Posted by Aswini Aluri. (Nov 20, 2013)
 

Class is an user defined datatype.

  Posted by Bhanu Pratap Yadav. (Sep 19, 2013)
 

It is blue print of real word existence. It is collection of feature of behavior in the real word existence.

  Posted by Trinadh. (Jun 19, 2013)
 

Class is a logincal reprsentation.

  Posted by Satish. (May 28, 2013)
 

Class is a collection of object. Class is like a blueprint through which individual objects are created.

  Posted by Ashish. (May 28, 2013)
 

Class is template of object. EX - suppose we have a car & there are different type of accessories in car. like breaks, gear, CD player, etc all are the object & combination of it is called class.

  Posted by Jai. (Apr 24, 2013)
 

It is a logical representation of a physical object(entity).
Example:
Class Fruit {
string name; string shape; string odour; double price; -- ---
}

public static void Main() {
Fruit Apple=new Fruit();
}

Here Fruit is a class (general representation ) and Apple is physical.

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4. What are the six benefits and goals of object-oriented programming?
 
    The six benefits of OOP are programs that are
  • Natural
  • Reliable
  • Reusable
  • Maintainable
  • Extendable
  • Timely
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5. What are the basic OOPS concepts?
 
  • Abstraction
  • Encapsulation
  • Inheritance
  • Polymorphism
  Posted by Rajareddy. (Mar 18, 2014)
 

Encapsulation :- It is a process of wrapping or binding state(variables) and behavior(methods) in a single container.

  Posted by Gautam Kushwaha. (Feb 13, 2014)
 

polymorphism: one thing in different form. like as let us take a function area().

we use this area function in different form in same class like.
area(rock);
area(rock,socks);
area(rock,socks,takes); etc. means different uses of one function.

  Posted by Panneer Selvam. (Jan 23, 2014)
 

Encapsulation: Writing Operations and methods stored in a single class. This is Called Encapsulation Real Time Example:

Medical Capsuals i.e one drug is stored in buttom layer and another drug is stored in Upper layer these two layers are combined in single capsual.

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