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Home>IT Tests>Questions>Which concept of OOP allows to create a class which can not be instantiated ?

Question from the Object-oriented programming - Fundamentals test

Which concept of OOP allows to create a class which can not be instantiated ?

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Which concept of OOP allows to create a class which can not be instantiated ?

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In this code, the class B extends the class A. The class B overrides the method talk() from the class A. The object b is an instance of the class B. The object a is an instance of the class A. The object a is assigned to the object b. The object a calls the method talk(). The method talk() from the class B is called.