What is isa relationship?
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Can an object be garbage collected while it is still reachable?
When super keyword is used?
When do we use hashset over treeset?
Why doesn't the java library use a randomized version of quicksort?
What happens when the main() isn't declared as static?
What is the difference between applet and application?
What is included in core java?
What is the purpose of extern variable?
How can you avoid serialization in child class if the base class is implementing the serializable interface?
Can list be final in java?
What are data types in oop?
Write a program to solve producer consumer problem in java?