Is there any difference between nested classes and inner classes?
What is casting ?
Is a class subclass of itself?
what is the use of private constructor in core java?
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What is the difference between Java1.4 and Java1.5
Can we define private and protected modifiers for variables in interfaces?
What is the use of singleton?
What is the difference between numeric and integer?
what is mutability?which one is mutable String or StringBuffer?and why?give examples of each which shows the mutability of each String or StringBuffer
Assume a thread has lock on it, calling sleep() method on that thread will release the lock?
what are three ways in which a thread can enter the waiting state? Or what are different ways in which a thread can enter the waiting state? : Java thread
If you do not want your class to be inherited by any other class. What would you do?
what is the diffrence between class and object?