Explain about OOPS concepts and fundamentals.
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Is java supports multiple inheritance? explain?
Explain polymorphism citing an example.
how a marker interface gets its functionality and when we implements a marker interface how it got invoked
If there is no implementation of MARKER INTERFACE in java. Then how compiler come to know about specification.
What will be the default values of all the elements of an array defined as an instance variable?
Why do we need autoboxing in java?
What is the purpose of the system class in java programming?
What is the purpose of default constructor?
What is the abstraction?
What are the override methods in Object class?
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What is nextint java?
How to change the priority of thread or how to set priority of thread?
Core Java 
