Is null an object java?
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explain copyonwritearraylist and when do we use copyonwritearraylist?
Is empty .java file name a valid source file name?
Explain access modifiers in java.
How do you ensure that n threads can access n resources without deadlock?
Can we call virtual funciton in a constructor ?
Why we need to serialize the object
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I don’t want my class to be inherited by any other class. What should I do?
which methods consisting of the serilizable interface?
why an outer class cannot be declared as private?
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How can we handle runtime exceptions? write one sample program? Can we write runtime exceptions beside the throws key word? if yes write sample program?
What are the types of java?
Core Java 
