What is the point of polymorphism java?
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How many JVMs can run on a single machine and what is the meaning of Just-In-Time (JIT) compiler?
When is an object in the mean to garbage collection?
Does printwriter create a file?
What is palindrome in java?
Why is an interface be able to extend more than one interface but a class can’t extend more than one class?
What is constructor
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List any five features of java?
Where is jre installed?
How many types of array are there?
What is thread synchronization in java?
What is the return type of readLine() when end of a file is reached?
How can you make sure that your singleton class will always return single instance in multi-threaded environment?