Description: An interface is a specification that defines a set of methods and properties that a class must implement. In the context of object-oriented programming, interfaces allow for establishing a contract that classes must adhere to, ensuring that certain functionalities are available without needing to define how they are implemented. This promotes modularity and code reuse, as different classes can implement the same interface in various ways. Interfaces are fundamental to polymorphic programming, where objects of different classes can be used interchangeably as long as they implement the same interface. Additionally, interfaces can include abstract methods, which have no implementation, and properties that must be defined by the classes that implement them. This allows developers to create more flexible and scalable systems, facilitating the integration of new functionalities without altering existing code. In summary, interfaces are a key tool in software architecture, promoting separation of concerns and clarity in code structure.