Which sort is best in java?
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Can a boolean be null java?
What is externalizable?
What are synchronized methods and synchronized statements in java programming?
what is the difference between HashMap and Hashtable
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What is Restrictions in hibernate?
Suppose there is an Online shopping cart application having different objects like Cart, SelectionItem, Billing, COnfiguration, Authentication, Authorization, PersonalDetails etc. Out of this which one can be made a singleton pattern and why?
What is the GregorianCalendar class?
What is difference between compatible and incompatible changes in serialization?
What are exceptions
What is the use of join method?
What collections you have worked on? Internal working of Hashmap?
What is compareto?