Chapter 8 - Exercise 3 Solution

[bertobettencourt]

Q: What can you say about the relationship between ClassB and ClassB2?

A: They are individual classes, while both are subclasses to ClassA, or both have the same superclass, they have no relation between each other.


Q: Identify the hierarchical relationship the NSObject class, ClassA, ClassB and ClassB2

A:    
              
          
                                        NSObject   (rootclass )
                                             |
                                         ClassA      (superclass to ClassB and B2, and subclass to NSObject)
                                        /         \
                               ClassB          ClassB2      (ClassB and ClassB2 are subclasses of ClassA);
            


Q: What is the superclass of ClassB?

A: The superclass of ClassB is ClassA and NSObject.


Q: What is the superclass of ClassB2?

A: The superclass of ClassB2 is also ClassA and NSObject.


Q: How many subclasses can a Class have, and how many superclasses can it have?

A: As many as your memory capacity allows, thousands, millions even trillions. (Needs confirmation)

[cary_W]

I think limited superclass can a class have when the superclass reaches the rootclass.