What is the purpose of Void class?

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What is mutable object and immutable object?

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What kind of thread is the Garbage collector thread?

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What are Wrapper Classes ?

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What is the initial state of a thread when it is created and started?

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What is the use of the finally block?

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What is a Vector? java interview questions ...

 the vector answer coming soon......

What is synchronization? java interview questions ...

the synchronization answer coming soon...........

Why threads block or enters to waiting state on I/O? java interview questions ...

the thread blog or enters to waiting state in I/O answer comming soon........