What are the four important foundation concepts of OOP ?
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What is the default access modifier for a class,struct and an interface declared directly with a namespace?
Explain serialization and overriding?
Why use oops?
What do you mean by abstract classes?
What is an USECASE? Why it is needed?
What is the main use of message metaphor in object-oriented programming?
How many methods do u implement if implement the serializable interface?
What is polymorphism? When is it employed? give an example.
What is virtual?
What is the difference between static and dynamic Classificaition.Give some examples.
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What is the benefit of Composition over Inheritance?
Difference between abstraction and implementation hiding ?
Design Patterns 
