How many methods do u implement if implement the serializable interface?
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Give any criteria when you use an abstract class and an interface?
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What is a static method? Why do we need static methods in java 8 interfaces?
Explain method overriding.
What are the four important foundation concepts of OOP ?
What is difference between encapsulation and abstraction?
What are the major differences between late and dynamic binding?
Is it possible to override private virtual methods?
What are the methods required to create changes in subclasses?
Why dynamic binding is used in object-oriented programming?
What is association?
What is data abstraction? what are the three levels of data abstraction with Example?
Why do we use oops concepts? What is its advantage?
Design Patterns 
