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polymorphism

 
Ranch Hand
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polymorphism allows a variable of the superclass to refer to an object of the subclass.

wats the benefit?
how do we practically use it?
Does this topic occupy big part in the exam?
 
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Yes, polymorphism is a very important topic. See How my dog learned polymorphism to see why.
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
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