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.
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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.
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Which input element does lexical analysis of Action Language for Foundational UML text discard?
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Which capability enables the discovery and manipulation of metaobjects and metadata''
The capability that enables the discovery and manipulation of metaobjects and metadata isReflection. In the context of the Meta-Object Facility (MOF), reflection allows you to examine and interact with the structure and semantics of metamodels, models, and their elements. It provides a way to introspect and dynamically access information about the modeling constructs, such as classes, attributes, relationships, and constraints.
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