OMG-OCUP2-ADV300 Exam Dumps - OMG Certified UML Professional 2 (OCUP 2) - Advanced Level

In UML Sequence Diagrams, a "neg" (negative) combined fragment is used to specify invalid or forbidden interactions. Therefore:

• A.Incorrect, because a "neg" fragment defines an invalid interaction, so following it by normal positive constructs does not affect its interpretation of invalidity.
• B.Incorrect, as nesting a "neg" fragment within another "neg" fragment does not inherently result in valid traces.
• C.Correct. Normal positive constructs followed by a "neg" fragment define some sequences of interactions as invalid, which is the intended use of the "neg" fragment.
• D.Incorrect, because an "assert" fragment is used to specify required interactions, and containing a "neg" fragment within it does not make the invalid traces valid.

References:

• UML Specification: Interactions section, particularly the explanation of combined fragments and their meanings.
• The negative combined fragment and its semantics are discussed in the UML 2.5 Documentation, under the Sequence Diagrams and Combined Fragments sections.

The UML diagram fragment provided shows a UML profile with a required extension from the metaclassClassto the stereotypeDisplayArea, which in turn has two subclassesFrameandForm. The use of{required}indicates that whenever an instance ofClassis extended by theDisplayAreastereotype, it becomes mandatory to do so. However, this does not enforce that every instance ofClassmust be linked toDisplayAreaor its subclasses (FrameorForm). It only means that if theDisplayAreastereotype is applied, it is required. Therefore, there is no obligation for every instance ofClassor its subclasses to be stereotyped asDisplayArea,Frame, orForm. 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.

In fUML (Foundational UML), an execution model must be modeled as an Activity. fUML is a subset of UML that includes the ability to model behavior using UML activities, which are composed of a rich set of primitive actions1. Activities in fUML represent the executable aspects of a model and define the flow of control and data2. They are the primary means for specifying the detailed procedural logic of the behavior of a system within fUML.

The class templateListshown in the diagram fragment is a parametrized class with two template parameters:Tandn. The signature of the class template includes both of these parameters. The template parameterTrepresents a type that can be bound to a specific class when the template is instantiated, whilenrepresents an integer value that specifies the multiplicity of elements that can be contained in the list. Therefore, the signature of the class templateListis the ordered set{T, n: Integer}, which includes both the type parameterTand the integer parameternindicating the maximum number of elements the list can hold.

For asynchronous invocations in UML, when an exception is thrown and there is no matching exception handler within the activity, the exception is effectively lost because there is no direct mechanism to propagate it back to the caller. This reflects the nature of asynchronous communication where the calling process does not wait for the completion of the called process and, thus, may not be designed to handle exceptions that occur during the called process.

References:

• UML 2.5 Specification: The UML specification describes the behavior of actions within activities and how exceptions are handled, or not handled, in the case of asynchronous calls. It specifically states that for asynchronous calls, the exception is not propagated back to the caller as there is no return flow defined for such invocations.

The sequence diagram depicts interactions over time between different entities. To determine the order of events, one must follow the flow of messages from top to bottom, as this represents the chronological order in which these interactions occur.

In the given diagram, 'HH' is a lifeline that is eventually destroyed, indicated by the finalization (cross) symbol at the bottom of its lifeline. The reception of 'z' is an event that happens between the lifelines labeled 'xX' and 'yY', and the reception of 'w' is an event that happens between 'q:Q' and 'p:P'. Since sequence diagrams are read from top to bottom, the message 'w' is the last one before the destruction of 'q:Q', which isindicated by the destruction occurrence specification (cross) at the bottom of 'q:Q'. Therefore, the last event that occurs according to the diagram is the reception of 'w'.

References to UML 2 specifications include:

• UML 2.5 Specification (formal/2017-12-05), by Object Management Group, which describes the semantics of sequence diagrams, interactions, and the interpretation of message flows and lifeline termination.
• Sequence Diagrams in UML, which explain the order of interaction and message passing between lifelines.

Regarding the development of alternate syntax for Actions in UML:

• A.Incorrect, as it does not address the need to align with the standard abstract syntax of UML.
• B.Correct. When developing alternate syntax (graphical or textual), it should still map back to the standard abstract syntax of UML, ensuring that the semantic meaning is preserved across different representations.
• C.Incorrect, as UML does not explicitly forbid alternate graphical concrete syntax if it adheres to the abstract syntax rules.
• D.Also incorrect, as alternate textual syntax is allowed provided it conforms to the abstract syntax.

References:

• UML Specification: Notation section, which discusses the requirements and flexibility regarding syntax representation.
• More on the abstraction and syntax can be found in the introductory and foundational chapters of the UML 2.5 Documentation.

In UML, a simple State can indeed be redefined, but the specifics of how it is redefined matter:

• Ais incorrect as redefinition of States, including simple States, is permitted.
• Bis correct. A simple State can be effectively removed or altered through redefinition in a derived StateMachine, which could include changing its type or characteristics.
• Csuggests 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.
• Dis incorrect; UML does support State Redefinition.

References:

• 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.