Free OMG OMG-OCUP2-FOUND100 Practice Exam with Questions & Answers | Set: 3

The second diagram fragment you provided includes two enumeration types, YesNo and Answer, where YesNo is a generalization of Answer. The class Query has an attribute 'response' of type Answer. Given that YesNo is a generalization of Answer, the possible values for 'response' include the literals of Answer plus those inherited from YesNo. Since Answer includes 'Maybe', and YesNo includes 'Yes' and 'No', all three are valid values for 'response'.

References:

• UML 2.x Superstructure Specification: Discusses attributes and their types, the concept of generalization, and how attributes of a generalized type can take on values from their own literals as well as those from their parent in the hierarchy.
• UML 2.x Infrastructure Specification: Explains the foundational modeling constructs related to enumeration, classes, and attributes, which provides the basis for determining the legal values of an attribute based on its type's enumeration literals.

In UML sequence diagrams, a signal is typically represented as an asynchronous message without a return value. Asynchronous messages are often denoted with an open arrowhead, and they can represent the sending of a signal.

Looking at the diagram provided, 'p' is sent from 'v2[C]' to 'v3[B]' with an open arrowhead, which indicates that it is an asynchronous message. This fits the common representation of a signal, as it does not expect a response.

'A', 'B', and 'C' do not represent signals in the context of a sequence diagram: A) 'v' is not shown in the diagram; it might refer to a lifeline, which is not a signal. B) 'B' refers to a class or object type and not a message or signal. C) 'm' is represented as a synchronous message (as it has a return arrow), which is not typical for signals.

Therefore, the correct answer is:

D. p

An OpaqueExpression in UML 2 is used to specify behavior in a textual form when it is not necessary to specify which language is used, or when it is not possible to use graphical notation. According to the UML 2 specification, an OpaqueExpression is not limited to any particular language; it can represent expressions written in any language.

The key characteristics of an OpaqueExpression are as follows:

• The 'body' of an OpaqueExpression is a sequence of strings, where each string could be written in a different language. This means it has the capacity to include multiple languages simultaneously.
• The 'language' attribute is optional and is used to indicate the languages of the respective 'body' parts.

The allowance for any language is clearly stated in the UML 2 Infrastructure Specification. OpaqueExpression is designed to be a flexible way to capture expressions that are not readily expressible in UML or when using a language outside the scope of UML (e.g., mathematical expressions, programming languages, or other domain-specific languages).

In a UML sequence diagram, a lifeline is identified by a box at the top of a dashed line that represents the presence of an individual participant in an interaction. The box contains the name of the lifeline, and optionally, it can include the object name and its classifier type.

In the diagram provided, the leftmost lifeline is labeledv[1]:B, which denotes an instance namedv[1]of the classifierB. The name of the property that the lifeline represents isv[1], asBis the type of the object that the lifeline represents, andmrepresents a message, not a lifeline.

Therefore, the correct answer is:

A. v[1]

The image depicts a state machine with the following states:

• S1
• S2

The state machine transitions are labeled as follows:

• gxSH - This triggers the transition from the initial state to S1.
• E - This event triggers the transition from S11 to S21.
• exS1 - This signifies exiting state S1.
• exS11 - This signifies exiting state S11.
• entS2 - This signifies entering state S2.
• entS21 - This signifies entering state S21.
• actnE - This indicates an action associated with the E event.

Given the state machine is currently in state S11 and an event of type E occurs, here's the sequence of behavior executions:

• actnE: The action associated with event E is executed.
• exS11: The state machine exits state S11.
• exS1: Since S11 is nested within S1, exiting S11 also implicitly triggers exiting S1.
• entS2: The state machine enters state S2.
• entS21: The state machine enters the nested state S21.

Justification for excluding other options:

• Option A (actnE; exS1; exS11: entS21; entS2) has the order of entering S2 and S21 reversed.
• Option C (exS11; actnE; entS2) omits the execution of the action associated with event E.
• Option D (gxSH; exS1; actnE; entS2) includes the irrelevant initial transition trigger (gxSH).
• Option E (exS11; exS1; actnE; entS2; entS21) has an extra exiting of state S1, which is not part of the valid transition path.

Following the state transitions and action triggers depicted in the state machine diagram, option B accurately reflects the sequence of behaviors that occur when event E triggers a transition from state S11.

The image depicts a state machine with three states labeled "state1" and "state2". Three events,e1,e2, ande3, are shown triggering transitions.

Analyzing the diagram, we can observe that all three events (e1,e2, ande3) are required for the transition from state1 to state2. The events are arranged sequentially, implying a specific order for the transition to occur.

Here's a breakdown of the reasoning for excluding other options:

• Option A (When all of el. e2. and e3 occur in any order) is incorrect because the order of events matters.
• Option B (When any one of the events e1. e2. or e3 occurs) is incorrect because all three events are necessary for the transition.
• Option D (Never, because a transition cannot have more than one trigger) is incorrect because the state machine can transition with multiple triggers, but in this specific case, the order is crucial.

Therefore, based on the visual representation of the state machine, the correct answer is that the transition to state2 happens only when eventse1,e2, ande3occur in precisely the specified order

The sequence diagram provided shows two messages being sent:m2()andm1(). The vertical placement of messages on a sequence diagram typically indicates the order of message passing; however, if there is no horizontal line connecting the lifelines or an explicit ordering constraint provided, it suggests that the messages are asynchronous and there is no specified order between them.

In this diagram, there is no horizontal line connecting the lifelines foro2ando3, nor is there any other notation that would imply a strict ordering. This means that the messagesm2()andm1()can occur in any order, and the interaction is still considered valid.

Therefore, the correct answer is:

C. An execution of InteractionF can be valid no matter the order in which o2 and o3 receive their respective messages.