Do Classes and Objects Represent an ‘Is-A’ Relationship?

The 'is-a' relationship is primarily used to determine if inheritance applies. For example, a car is a type of vehicle, and a vehicle has a set of wheels. So, it’s a way to see if one class is a specialization of another.

That's correct! The term 'is-a' should only refer to relationships between classes. An object is simply an instance of a single class, so there's no direct relationship to compare beyond that.

To clarify, while some languages might blur these lines, generally speaking, no, a class and an object do not express an 'is-a' relationship in the traditional sense.

Not really. The 'is-a' concept is about inheritance, like how an Employee class is a type of Person class. However, an object like Worker Bob is just an instance of the Employee class, which makes 'is-a' and 'instance of' different concepts.

Exactly! An object is just an instance of a class. It doesn't necessarily imply that it exists in the 'is-a' hierarchy.