Question

What is the difference between instance and class variables?

a) Instance variables are associated with the class, while class variables are associated with instances.
b) Instance variables are declared with "static", while class variables are not.
c) Instance variables have only one copy, while class variables may have 0 or more copies.
d) Instance variables are associated with each instance of the class, while class variables are associated with the class (not with instances).

Answer 1

Instance variables are unique to each instance of a class, while class variables are associated with the class itself and shared among all instances.

Step-by-step explanation:

The difference between instance variables and class variables lies in their scope and how they are associated with the class and its instances.

• Instance variables are associated with each instance of the class. This means that each object created from the class has its own copy of instance variables.
• In contrast, class variables are associated with the class itself, not the instances. There is only one copy of a class variable, and it is shared among all instances of the class.

To sum up, instance variables are for data unique to each instance, while class variables hold data that is shared across all instances of the class.