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“abstractin” Code Answer

abstractin

whatever by Obedient Ocelot on Jan 05 2021 Donate

Sometimes we may come across a situation
where we cannot provide implementation to
all the methods in a class. We want to leave the 
implementation to a class that extends it.
  In such case we declare a class
as abstract.To make a class abstract
  we use key word abstract. 
Any class that contains one or more abstract
  methods is declared as abstract. 
If we don’t declare class as abstract which
contains abstract methods we get 
compile time error.
  
  1)Abstract classes cannot be instantiated
  2)An abstarct classes contains abstract method,
concrete methods or both.
  3)Any class which extends abstarct class must
    override all methods of abstract
    class
  4)An abstarct class can contain either
    0 or more abstract method.

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