MCQ: Which option is false about the final keyword?

Which option is false about the final keyword?

  1. A final method cannot be overridden in its subclasses.
  2. A final class cannot be extended.
  3. A final class cannot extend other classes.
  4. A final method can be inherited.

Answer

  1. A final class cannot extend other classes.

Explanation:

Answer: (c) A final class cannot extend other classes.

Explanation: The final is a reserved keyword in Java that is used to make a variable, method, and class immutable. The important features of the final keyword are:

  • Using the final keyword with a variable makes it constant or immutable. We can't reassign the values of it.
  • A final variable must be a local variable and cannot be used in other classes.
  • Using the final keyword with a method makes it constant, and we can't override it in the subclass.
  • Using the final with a class makes the class constant, and we cannot extend a final class. But a final class can extend other classes.

Hence, the correct answer is an option (c).


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