What is the purpose of a constructor in Object-Oriented Programming?

The primary purpose of a constructor in Object-Oriented Programming (OOP) is to initialize an object. When a new instance of a class is created, the constructor is a special method that is automatically called to set up the initial state of that object. This may involve assigning values to attributes, setting up necessary resources, or performing other setup tasks.

Constructors allow for the encapsulation of the object's initialization logic, making it easier to ensure that all necessary data is provided and that the object is in a valid state before it is used. This process contributes to the robustness and reliability of the code by ensuring that an object is always created with the necessary configurations right from the start.

The other options, while related to OOP, describe different concepts. Creating subclasses pertains to inheritance, implementing interfaces deals with defining contracts for classes, and managing memory is related to how objects are stored and accessed in a running program, which is typically handled by the runtime environment or garbage collector rather than being the responsibility of constructors.