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Which of the following is false about abstract classes in Java?

  1. If we derive an abstract class and do not implement all the abstract methods, then the derived class should also be marked as abstract using 'abstract' keyword.
  2. Abstract classes can have constructors.
  3. A class can be made abstract without any abstract method.
  4. A class can inherit from multiple abstract classes.
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1 Answer

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Multiple inheritance through classes isn't allowed through classes, but allowed through interface. D is wrong.

All other are correct.

Good read:

https://www.geeksforgeeks.org/abstract-classes-in-java/

Answer:

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