Aprogram uses two classes: dog and poodle. which class is the base class and which is the derived class?

Dog is the base class and poodle is the derived class. 

Dog is the base class and poodle is the derived class.
There had to be dog in order for there to be poodle, because poodle is a dog(meaning poodle came from dog). 
Therefore, poodle is a type of dog, so it derived from the dog.
Example; without your parents there would be no you, so you derived from your parents.