What is data encapsulation and what's its significance?
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What is the benefit of using inheritance?
What are inner classes and what is the practical implementation of inner classes?
Explain the different types of constructors
What is a default method? Why do we need default methods in java 8 interfaces?
Is iterator a class or interface? What is its use?
What's the benefit of using inheritance?
What is the difference between a class and an object?
Who is an Actor?
Why are virtual users created?
Explain the meaning of object in object oriented programming?
Whether static method can use nonstatic members?
What are the tools you used for OOAD?