OMG-OCUP2-ADV300 Exam - Topic 4 Question 44 Discussion

Given that the system is in StateA1, the sequence of triggers that will move the system to StateC must take into account the transitions and their associated triggers as defined in the UML state diagram. Starting from StateA1, the trigger a5 will cause a transition within StateA, followed by a6, which moves to StateA2. The trigger a5 is not relevant as it is an internal transition in StateA1. Then, a3 (the exit action for StateA) and a2 would be followed to leave StateA altogether. Once out of StateA, a1 is used to transition to StateB, where a10 is an entry action, not a trigger. Finally, to get from StateB to StateC, the triggers a11 followed by a12 are needed. This sequence of triggers reflects the correct usage of exit, entry, and transition triggers as defined by UML state machine semantics.