e accessibility of a protected attribute that is in a public class?     A. Any class has access to this attribute. B. Only the class and its subclasses have access to this attribute. C. Only the class itself has access to this attribute. D. Any class in the same package has access to this attribu

Which of the following statements are true? Group of answer choices 1. A superclass reimplements the functionality of its subclasses. 2. A class that implements an interface reuses the functionality of the interface. 3. A derived class reuses the functionality instead of reimplements it. 4. If a class has no bugs, we can inherit from it without fear of having any bugs in our class.

Isn't it better to just put this data into the instance of the currently active class? If not, why not?

1.A system offers four service classes A, B, C and D, which differ in price tag and have a distinctive public method doA(), doB(), doC(), and doD(), respectively. These classes do share an identical public feature doCommon() method. The price attribute is private and is declared only once somewhere to be shared by all service classes. To use the system, a selected service is first paid for and the corresponding object is created to run the distinctive method and then the doCommon() method. Show the UML class diagram for the system. Extra interfaces, classes or methods can be added if needed   2.Today, the distinctive methods are changed to a private visibility. This however limits a created object to call its own method. Redesign the system to solve the problem by calling a public method doJob() and utilizing polymorphism and dynamic binding to provide the distinctive service for a selected class. Extra interfaces, classes or methods can be added if needed. 3. Show only the program…