How does singleton class work?
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Differentiate Vector and ArrayList?
Difference between ?System.out.println? and ?System.error.println??
Can you extend singleton class?
What is the frontend and backedn in Java?
What is hashmap and map?
Why operator overloading is not in Java?
what is the diff b/w arraylist and vector?
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Why java is platform independent? Explain.
What isan abstract class and when do you use it?
Why is the type for real numbers called double?
What is the USE of Null interfaces ??...if thers nothing inside these interfaces how are they used and WHy are they used ???? No 1 has given a proper description yet
What is the synchronized method modifier?