Answer
calculator calc;
Explanation
An object is an instance of a class. And a class is what defines or describes the behavior or the state of the object of its type. When a class is defined no memory is allocated until when an object is created memory is allocated.
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Records for the first one and table for the second one
The correct answer is option D.
i.e. graphic user interface allows users to control software operations by clicking and pointing with a mouse.
GUI is a type of interface that allows the user to interact through computer graphics.
