Which of the following can reuse the method doSomething from the class Substance? a)doSomething.Substance b)Substance.doSomething c)doSomething from Substance d)doSomething(Substance)

Which of the following is true regarding abstract classes or abstract methods? (Select all that apply) All methods in an abstract class must be overriden and implemented in any of its subclasses. Abstract classes only become useful when we create objects from them. Abstract classes only become useful when they are extended. Abstract methods must be overriden

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.

What are the names of the variables in a class? Group of answer choices G.I.Joe structure access members Those things we discussed in class...