What are the data types specific to object-oriented programming?

Object-oriented programming (OOP) specific data types include classes, objects, and interfaces.

In more detail, object-oriented programming is a programming paradigm that uses "objects" – data structures consisting of data fields and methods together with their interactions. The key data types specific to OOP are classes, objects, and interfaces.

A class is a blueprint for creating objects. It defines a set of properties and methods that are common to all objects of one type. For example, a class could be 'Car', with properties like 'colour', 'model', 'year', and methods like 'startEngine', 'stopEngine', 'accelerate', etc. The class defines what a car is in general, not a specific car.

An object is an instance of a class. It's a specific example of a class. For instance, if 'Car' is a class, then 'myCar = new Car("red", "Toyota", 2019)' could be an object. 'myCar' is a specific car, with specific properties, created from the 'Car' class blueprint.

An interface is a contract for a class. It defines a set of methods that a class must implement. Interfaces are used to enforce particular behaviours. For example, if 'Car' is a class, there could be an interface 'Drivable' that requires that any drivable class must have methods 'startEngine', 'stopEngine', 'accelerate', etc. If 'Car' implements 'Drivable', it must define these methods.

In addition to these, OOP also uses other data types common to most programming languages, such as integers, booleans, floats, strings, arrays, etc. However, these are not specific to OOP. They are used in many different types of programming languages, not just object-oriented ones.

In conclusion, the data types specific to object-oriented programming are classes, objects, and interfaces. These are used to define and create objects, and to enforce specific behaviours.