What is data abstraction? what are the three levels of data abstraction with Example?
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What are inner classes and what is the practical implementation of inner classes?
What interface must an object implement before it can be written to a stream as an object?
Explain about Overloading vs Overriding ?
Explain about inheritance?
How to make a class accessible as a web service?
What is a ternary operator?
Explain about polymorphism?
Can I implement polymorphism using abstract class?
Does a class inherit the constructor of its super class?
Difference between Composition and Aggregation
What is the difference between abstract & interface?
How will you define abstract classes?