Core Java Interview Questions 1 What is the difference between an Abstract class and Interface?


) What is the Collection interface?



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core java interview ques

139) What is the Collection interface?
The Collection interface provides support for the implementation of a mathematical bag - an
unordered collection of objects that may contain duplicates.
140) What modifiers can be used with a local inner class?
A local inner class may be final or abstract.
141) What is the difference between static and non-static
variables?
A static variable is associated with the class as a whole rather than with specific instances of
a class. Non-static variables take on unique values with each object instance.

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