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Can State Machine Events have Features?
Suggested Answer: C
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State Machine Events in UML are triggers for transitions and do not classify as objects or classifiers; thus they do not inherently have features:
A . Incorrect, because State Machine Events are not treated as classifiers with features.
B . Incorrect, though it hints at an extended use case, State Machine Events do not extend classifiers in standard UML usage.
C . Correct, State Machine Events are not Classifiers and therefore cannot have features such as properties or operations.
D . Incorrect, because UML State Machines certainly have an Event concept, but these Events are not classified as having features.
UML Specification: State Machine chapter, specifically sections discussing the nature of events and triggers.
Further insights can be found in the event and trigger management sections of the UML 2.5 Documentation.
34 comments · newest first
TO
Tom
10 months ago
Wait, are we sure about this? I thought State Machines couldn't have features at all!
MI
Millie
11 months ago
D seems off, UML does have an Event concept.
MA
Mabelle
11 months ago
C is definitely wrong, State Machine Events are part of UML.
TH
Theodora
11 months ago
I think B makes more sense, though.
TE
Teri
11 months ago
A is correct, State Machine Events can have features.
KR
Kristin
12 months ago
I practiced a similar question, and I think the answer is B. It makes sense that they can have features if they extend Classifier.
CR
Cristal
12 months ago
I’m a bit confused about the Event concept in UML State Machines. I thought they did have it, but maybe I misread something.
KA
Kathrine
12 months ago
I remember studying that State Machine Events are not Classifiers, so I feel like option C might be correct.
TO
Torie
1 year ago
I think State Machine Events can have features, but I'm not sure if it's only when they extend Classifier. That sounds familiar.
SC
Scarlet
1 year ago
I'm a bit confused by this question. My understanding is that State Machine Events are not Classifiers, so they shouldn't be able to have Features. But I'll double-check the details before answering.
RO
Ronald
1 year ago
Okay, I think I know the answer to this. State Machine Events can have Features, but only if the Events also extend Classifier. I'm confident that's the correct answer.
VI
Vivan
1 year ago
Hmm, this is a tricky one. I'm not sure if State Machine Events can have Features or not. I'll have to review the UML specification to be sure.
DO
Dortha
1 year ago
I'm pretty sure State Machine Events can have Features, but I'm not 100% certain. I'll need to think this through carefully.
LA
Latia
2 years ago
Wait, State Machine Events can have Features? I thought they were just for triggering transitions. This UML stuff is getting too complicated for me.
RU
Rusty
2 years ago
Option D, really? UML State Machines definitely have an Event concept. This question is way too easy.
WA
Wai
2 years ago
I'm going to have to go with option C. State Machine Events are not Classifiers, so they can't have Features. This seems like a pretty straightforward question.
JA
Jackie
2 years ago
Yes, State Machine Events cannot have Features because they are not Classifiers.
DE
Delsie
2 years ago
I agree, option C is the correct answer. State Machine Events are not Classifiers.
VA
Vanesa
2 years ago
I'm not sure, but I think the answer is C.
NI
Nickole
2 years ago
Hmm, I think option B is the correct answer. State Machine Events can have Features, but only if they extend Classifier. The UML standard is pretty clear on this.
RE
Rex
2 years ago
I believe option C is the correct answer. State Machine Events cannot have Features because they are not Classifiers.
PE
Peter
2 years ago
I think option A is the correct answer. State Machine Events can have Features without extending Classifier.
WI
Willodean
2 years ago
I agree with you, option B is the correct answer. State Machine Events can have Features if they extend Classifier.
DI
Dino
2 years ago
I disagree, I believe the answer is A.
CE
Celestina
2 years ago
I think the answer is B.
KE
Kenia
2 years ago
I'm pretty sure State Machine Events can have Features, but I'm not sure about the details. The UML spec should have more information on this.
KE
Kenneth
2 years ago
Good idea. It's always best to refer to the official documentation.
FE
Felix
2 years ago
That makes sense. I'll check the UML spec for more details.
KA
Kati
2 years ago
Good idea. It's always best to refer to the official documentation.
VI
Vincent
2 years ago
That makes sense. I'll check the UML spec for more details.
BE
Belen
2 years ago
Yes, they can. But only when the modeled Events also extend Classifier.
AL
Aleta
2 years ago
I think State Machine Events can have Features.
JU
Jules
2 years ago
Yes, they can. but only when the modeled Events also extend Classifier.
DA
Daniel
2 years ago
I think State Machine Events can have Features.