What is the difference between an Abstract class and Interface?
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Can constructors be parameterized?
Explain what you understand by function overloading.
Can we override static methods of a class?
What is the difference between public, private and protected access modifiers?
What are the interfaces you used in beans?
What is a Persistent, Transient Object?
What is the practical implementation of inner classes?
What is abstract method?
What is the difference between new and override?
Why are virtual users created?
Explain the implementation phase with respect to oop?
Is @functionalinterface annotation mandatory to define a functional interface? What is the use of @functionalinterface annotation? Why do we need functional interfaces in java?