How to achieve data abstraction?
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What is a default method? Why do we need default methods in java 8 interfaces?
Define Initialisation Purpose.
What are the tools you used for OOAD?
What is bootstrap, extension and system class loader?
Are constructors inherited? Can a subclass call the parent's class constructor? When?
What is diamond inheritance problem? How java 8 solves this problem?
What is the difference between multiple and multilevel inheritance?
What are sealed modifiers?
How do you prevent a class from being inherited by another class?
Explain the abstract class modifier?
What is data encapsulation and what's its significance?
What are the methods required to create changes in subclasses?