Answer to Question 1
The user interface requires models that are intelligible to owners and users as well as to analysts, designers, and developers. As classes and objects, the visual building blocks of the application are no different from entity or control classes and objects, and they can be modeled with the same UML tools: class, sequence, activity, statechart, and other diagrams. Features that are specific to UI design are layout and navigation. None of the UI's distinctive features can be effectively modeled with a single tool or a single diagram.
Answer to Question 2
FALSE
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