What is a default method? Why do we need default methods in java 8 interfaces?
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What is the use if instanceof keyword?
What is data encapsulation and what is its significance?
What is the default access modifier in a class?
How to differentiate between a CreateObject() and GetObject() ?
Is class an Object? Is object a class?
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What is Polymorphism, overloading, overriding and virtual?
Explain about encapsulation?
Why dynamic binding is used in object-oriented programming?
What is serialization? How do we implement serialization actually?
Write about abstract base classes?
What is the base type from which all structs inherit directly?
Describe inheritance and non-inheritance of a derived class?
Design Patterns 
