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When is a state machine for an object created and ready to accept events?
Suggested Answer: C
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The initial node is depicted as a filled circle and is used to show where the control starts within the activity. When the activity is invoked, control tokens are placed on the initial node and can then traverse the outgoing edge to the first action or activity node. The specification clearly states that there should be only one outgoing edge, ensuring that the flow of control is unambiguous at the start of the activity.
It's important to note that while multiple initial nodes can exist within a single activity diagram, each initial node can only be the source of one outgoing edge, and thus, only one activity can feed each initial node.
38 comments · newest first
FR
Frank
10 months ago
B is definitely wrong, sequence diagrams don't dictate state machine readiness.
DO
Dolores
11 months ago
I thought it was A at first, but C seems right.
ME
Merilyn
11 months ago
Wait, isn't it D? I thought all objects had to be ready first.
CA
Catrice
11 months ago
Totally agree, C makes the most sense.
ME
Merissa
11 months ago
It's C! The object needs to finish initializing first.
AN
Antonio
12 months ago
I feel like it could be option D, but that seems too broad. I thought it was more about the individual object's readiness rather than the whole system.
NA
Natalya
12 months ago
I'm a bit confused about when exactly the state machine starts accepting events. Does it really depend on the sequence diagrams?
GE
German
12 months ago
I remember a practice question that mentioned state machines being ready when the object is fully initialized, so I might lean towards option C.
PH
Phung
1 year ago
I think the state machine is ready after the object finishes its initialization, but I'm not entirely sure if that's the right timing.
CA
Carmen
1 year ago
Based on my understanding of state machines, the correct answer is C. The state machine is ready to accept events by the time the object has finished its initialization.
LA
Lawrence
1 year ago
I'm a bit confused by the wording of the question. I'll need to re-read it carefully and consider the different options before making a decision.
ST
Stephen
1 year ago
Okay, let me break this down. The state machine is created and initialized as part of the object's initialization, so I think the answer is C.
SE
Selene
1 year ago
Hmm, I'm not sure about this one. I'll need to think through the lifecycle of a state machine to determine when it's ready to accept events.
GE
Gerald
1 year ago
This looks like a straightforward state machine question. I'm pretty confident I can figure this out.
AL
Alverta
1 year ago
If the state machine isn't ready by the time the last state ends, does that mean it's... state-less? *ba dum tss*
SH
Sharee
1 year ago
Oh, got it. Thanks for clarifying!
RE
Renea
1 year ago
Haha, good one! But no, it's actually when the object has finished its initialization.
RU
Rusty
1 year ago
C) by the time the object has finished its initialization
NO
Nobuko
1 year ago
A) by the time the last state ends
JO
Joaquin
1 year ago
A is my pick. The state machine is created and ready to go by the time the last state ends. Simple as that. Although I'm probably overthinking this...
MI
Mitzie
1 year ago
I'm with A too. It makes sense that the state machine is ready by the time the last state ends.
HE
Herschel
1 year ago
I think it's C. The state machine is ready to accept events by the time the object has finished its initialization.
BE
Bettina
1 year ago
I agree, A is the correct answer. The state machine is indeed created by the time the last state ends.
HI
Hillary
1 year ago
Hmm, I'm leaning towards D. Seems like the state machine should only be ready when the whole system is up and running, ready to receive events. Gotta think about the bigger picture.
NI
Nikita
1 year ago
I agree with you, D makes more sense. It's important for the state machine to be ready when the whole system is up and running.
SH
Sharita
1 year ago
I see your point, but I still believe it's D. The state machine should wait until all objects in the system are ready to receive events.
ME
Melda
1 year ago
I think it's actually C. The state machine should be ready once the object has finished its initialization.
HA
Hana
1 year ago
I'm gonna go with B. The state machine should be ready as soon as the sequence diagrams start, right? That's when the object's lifecycle begins.
EI
Eileen
1 year ago
User 4: I'm gonna go with B. The state machine should be ready as soon as the sequence diagrams start, right? That's when the object's lifecycle begins.
JU
Julieta
1 year ago
User 3: I'm not sure, but I think it's A. The state machine should be ready by the time the last state ends.
BE
Beckie
1 year ago
User 2: I agree with Beckie, C makes sense. The object needs to be fully initialized before the state machine can accept events.
BR
Brittney
1 year ago
User 1: I think the correct answer is C. The state machine is created by the time the object has finished its initialization.
JE
Jeannine
1 year ago
C is the correct answer. The state machine is ready to accept events once the object has finished its initialization. That makes sense to me.
DA
Daron
1 year ago
Yes, that makes sense. The state machine is ready after the object finishes initialization.
DE
Deonna
1 year ago
I think C is the correct answer.
FR
Francine
2 years ago
I'm not sure, but I think it's A) by the time the last state ends.
CA
Cassandra
2 years ago
I agree with Dacia, because the state machine needs to be fully initialized before it can accept events.
DA
Dacia
2 years ago
I think the answer is C) by the time the object has finished its initialization.