Why set is used in java?
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What is the size of boolean variable?
Every class extends object but why it is not possible for every object to invoke clone() method. ideally protected methods should be accessible from sub classes. isn't it?
What is module in project?
Is void a type?
how tha garbage collector know that the object will be deleted? on which algorithm the garbage collector works? what is the working principle of garbage collector? How manay types of garbage collectors r there?
Can a class extends itself in java?
What are operators and its types?
Suppose if we have variable ' I ' in run method, if I can create one or more thread each thread will occupy a separate copy or same variable will be shared?
Why Set interface contains unique elements, what internally implemented for this so that it contains unique elements?
How can you make sure that your singleton class will always return single instance in multi-threaded environment?
What is difference between path and classpath in java?
Implement two stacks using a single array.