Interface Specification

(1) Interfaces must be specified so that objects and subsystems can be designed in parallel

(2) Interfaces can be specified in UML using the «interface» stereotype in a class diagram notation - with no attribute section

(3) The same object may have several interfaces, each being a different viewpoint on the methods it provides

(4) Hiding data representation in an interface means that it can be changed without affecting objects that use that data

Explanation

Interface specification facts: interfaces must be specified to enable parallel design of objects and subsystems; interfaces are specified in UML using the «interface» stereotype (no attributes section - data representation is hidden); the same object may have multiple interfaces; hiding data representation allows it to change without affecting users. The false statement is that interfaces should include attributes - interfaces specifically exclude attributes to hide data representation.