Which of the following statements regarding abstract classes are true?

A. An abstract class can be extended.

B. A subclass of a non-abstract superclass can be abstract.

C. A subclass can override a concrete method in a superclass to declare it abstract.

D. An abstract class can be used as a data type.

E. All of the above

Answer: Option E

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Comments ( 1 )

  1. Mohamed Tanveejularsath
    Mohamed Tanveejularsath :
    5 years ago

    I felt option B is not true regarding abstract class

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