Explain the features of interfaces in java?
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When is update method called?
Can we create more than one object singleton class?
Describe how to implement singleton design pattern in struts.
what is run time polymorphism
What does isempty () do in java?
What are Access Specifiers and Access Modifiers.
Can an integer be a string?
Explain Big-O notation with an example
What is the difference between declaration and definition in java?
What class allows you to read objects directly from a stream?
Can a constructor be private and how are this() and super() method used with constructor?
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How many types of threads are there in java?