What is data abstraction? what are the three levels of data abstraction with Example?
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What is data encapsulation and what's its significance?
What is the benefit of Composition over Inheritance?
Is @functionalinterface annotation mandatory to define a functional interface? What is the use of @functionalinterface annotation? Why do we need functional interfaces in java?
What is the main difference between overloading and overriding?
Which oops concept exposes only necessary information to the calling functions?
What is the use if instanceof keyword?
Explain serialization and overriding?
Explain the purpose of composition.
What are different types of arguments?
What are the interfaces you used in beans?
What do you mean by "explicitly implemeting an interface". Give an example?
What is guard condition?
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