With Protected instance variables in the base class,all the derived classes of the base class may need to be modified if the base-class implementation changes.In such a case,the software is said to be non-modifiable,because a small change in the base class can "break" derived-class implementations.

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Quizplus · Accepted Answer

In such a case,the software is said to be brittle.

With Protected Instance Variables in the Base Class,all the Derived