OMG OMG Certifications OMG-OCUP-200 Questions & Answers

• Question 21:

  What is true about a pseudostate?

  A. not a state but a vertex

  B. a state entry or exit point

  C. a specification of a potential state

  D. a state that can be specialized for different purposes

  Correct Answer: A

• Question 22:

  What does the history of a state represent?

  A. most recent active configuration of its substates

  B. most recent transition that was taken into the state

  C. most recent transition that was taken out of the state

  D. number of times that the state has been active before

  Correct Answer: A

• Question 23:

  What does via foo in the exhibit designate?

  

  A. transient pseudostate named foo

  B. an action foo associated with the transition

  C. a transition terminating on the foo entry point

  D. the sending of a foo message on the transition E. a Boolean guard equal to the logical value of foo

  Correct Answer: C

• Question 24:

  Assume !x means sending message x and ?x means receiving message x. Which operator should replace the text "op" in the combined fragment such that is a valid trace.

  

  A. alt

  B. par

  C. loop

  D. rem

  E. critical

  Correct Answer: B

• Question 25:

  For what does an interaction operator define semantics?

  A. a particular message

  B. a particular interaction

  C. a particular combined fragment

  D. a particular interaction fragment

  Correct Answer: C

• Question 26:

  When either a message m or a message q is to be sent-but not both-what kind of operator for combined fragment would be used?

  A. opt

  B. alt

  C. var

  D. par

  E. break

  Correct Answer: B

• Question 27:

  What is true for part decomposition in interaction diagrams?

  A. always refers to methods of the decomposed lifeline

  B. must match the constructs of the decomposed lifeline

  C. cannot be reused as decomposition from another lifeline

  D. must always be owned by the same interaction as the decomposed lifeline

  Correct Answer: B

• Question 28:

  What is true about guards on interaction operands?

  A. must always cover all lifelines covered by the operand

  B. should not refer to any dynamic variables, i.e., to attributes of the lifelines

  C. must cover the same lifelines on all interaction operands within one combined fragment

  D. must only cover one lifeline, namely the one lifeline having the first event occurrence of the interaction operand

  Correct Answer: D

• Question 29:

  Which statements apply to arguments of interaction occurrences? (Choose two)

  A. The arguments may be constants (literals).

  B. The arguments may refer to parameters of the enclosing interaction.

  C. An argument of an interaction occurrence must only have simple types.

  D. Arguments to interaction occurrences must always correspond to IN-parameters.

  E. Arguments to interaction occurrences only apply when the corresponding interaction is value returning.

  Correct Answer: AB

• Question 30:

  In the exhibit, what applies if the interaction constraint is false when the loop is entered?

  

  A. The specification is illegal.

  B. All valid traces will include message r.

  C. The loop body is not included in a valid trace.

  D. Valid traces include both the case where the loop iterates once, and when it iterates zero times.

  Correct Answer: B