OOPS Interview questions

In all .net interviews the Object Oriented Related questions are inevitable. Weather you are a fresher or an experienced one no matters the Object Oriented questions are like mandatory thing for every interviews . I am listing out most frequently asked OOPS questions .

Q)What is OOPS? (OOPS Interview questions-1)

OOP is Object Oriented Progamming. OOPS Based system mainly deals with the Objects. Objectas are nothing but instants of a class.

Q)What is different concepts of OOPS? (OOPS Interview questions-2)

• Abstaction
• Encapsulation
• Inheritance
• polymorphism

Q)What is Abstraction?(OOPS Interview questions-3)

Abstraction is a concptual level in class design . Showing what is necessory is abstraction. Abstraction's main concept is to handle the complexity which is achived by hiding the unneccessory details from the end developer.

Q)What is Encapsulation? (OOPS Interview questions-4)

Encapsulation is wrapping the data and its all behaviours inside a sigle unit (class). In enclapusulation all data is not accessed directly , but it is accessed through the member functions present inside the class . So that the end programmer need not to worry about the implementation . They just have to use these functions and class. In another word encapsulation establishes the data hiding concept .

Q) What is polymorphism ? (OOPS Interview questions-5)

Polymorphism is the ability of an object to take more than one forms.It is the ability of the programming language to process objects differently based on the datatype . There are mainly two types of polymorphism  Compile time and Run time polymorphism

Q)What is Runtime Polymorphism ? (OOPS Interview questions-6)

Run time polymorphism is that the polymorphism archived at the run time of the execution. It is also called late binding , Method overriding . The method overriding is done by using 'virtual' keyword in the base class and 'override' keyword in the derived class.

Basically we can use the same function name in base class and derived class.

But the the actual method which runs when creating instance of the derived class will decide at the run-time. The memory binding will be done at the execution time.