Choose the correct answer:
Consider the following profile:
Which statement is true?
The UML diagram fragment provided shows a UML profile with a required extension from the metaclass Class to the stereotype DisplayArea, which in turn has two subclasses Frame and Form. The use of {required} indicates that whenever an instance of Class is extended by the DisplayArea stereotype, it becomes mandatory to do so. However, this does not enforce that every instance of Class must be linked to DisplayArea or its subclasses (Frame or Form). It only means that if the DisplayArea stereotype is applied, it is required. Therefore, there is no obligation for every instance of Class or its subclasses to be stereotyped as DisplayArea, Frame, or Form. It's also worth noting that the last option (E) could be considered true in some interpretations of UML, but given the options provided and common UML practices, option D is more accurate.
Choose the correct answer:
Which statement is correct about redefinition of simple States?
In UML, a simple State can indeed be redefined, but the specifics of how it is redefined matter:
A is incorrect as redefinition of States, including simple States, is permitted.
B is correct. A simple State can be effectively removed or altered through redefinition in a derived StateMachine, which could include changing its type or characteristics.
C suggests that a simple State can be turned into a composite State. While theoretically possible in the context of redefinition, this option might be considered a significant alteration that could be misleading without additional context.
D is incorrect; UML does support State Redefinition.
UML Specification, particularly the sections on Redefinition and StateMachines.
Detailed rules on state redefinition are outlined in the UML 2.5 Documentation, specifically under StateMachine specializations.
Choose the correct answer:
Consider the following diagram:
What kind of model element is chentNo?
In the context of the diagram, 'clientNo' is placed next to the association line between 'ExamCompany' and 'Examinee,' which indicates that 'clientNo' is a qualifier of the association. In UML, a qualifier is used to refine the association between two classes by providing a way to access linked objects based on some attribute value. The qualifier essentially acts as a key in an associative array or map, allowing access to instances of the associated class. In this case, 'clientNo' is likely used to uniquely identify examinees associated with an exam company. This use of qualifiers is detailed in the UML 2.x Superstructure Specification, which describes how qualifiers can be used to specify refined access to linked objects within an association.
Choose the correct answer:
Which input element does lexical analysis of Action Language for Foundational UML text discard?
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