OMG-OCUP2-FOUND100 Exam - Topic 5 Question 29 Discussion

Actual exam question for OMG's OMG-OCUP2-FOUND100 exam

Question #: 29
Topic #: 5

[All OMG-OCUP2-FOUND100 Questions]

Choose the correct answer:

When is a state machine for an object created and ready to accept events?

Aby the time the last state ends

Bimmediately after the sequence diagrams start

Cby the time the object has finished its initialization

Dwhen all objects in the system are ready to receive events

Show Suggested Answer

Suggested Answer: C

In UML, an initial node is the starting point of an activity thread and represents the start of the flow in an activity diagram.According to the UML 2.5.1 specification, an initial node has no incoming edges and precisely one outgoing edge1. This means that only one activity can feed an initial node at the beginning of an activity thread, which aligns with option C.

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.

For further details and verification, you can refer to the UML 2.5.1 specification, particularly Chapter 15.7, which covers the Activity, ActivityFinalNode, InitialNode, and other related elements2.Additionally, the Object Management Group (OMG) provides resources and guidelines for the UML exams, including the types of questions that may appear and the knowledge areas covered3.

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.

by Marva at Mar 09, 2025, 07:42 AM

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Frank

3 months ago

B is definitely wrong, sequence diagrams don't dictate state machine readiness.

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Dolores

3 months ago

I thought it was A at first, but C seems right.

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Merilyn

3 months ago

Wait, isn't it D? I thought all objects had to be ready first.

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Catrice

4 months ago

Totally agree, C makes the most sense.

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Merissa

4 months ago

It's C! The object needs to finish initializing first.

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Antonio

4 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.

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Natalya

4 months ago

I'm a bit confused about when exactly the state machine starts accepting events. Does it really depend on the sequence diagrams?

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German

4 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.

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Phung

5 months 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.

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Carmen

5 months 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.

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Lawrence

5 months 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.

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Stephen

5 months 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.

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Selene

5 months 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.

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Gerald

5 months ago

This looks like a straightforward state machine question. I'm pretty confident I can figure this out.

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Alverta

9 months 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*

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Sharee

8 months ago

Oh, got it. Thanks for clarifying!

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Renea

8 months ago

Haha, good one! But no, it's actually when the object has finished its initialization.

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Rusty

8 months ago

C) by the time the object has finished its initialization

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Nobuko

8 months ago

A) by the time the last state ends

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Joaquin

10 months 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...

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Mitzie

8 months ago

I'm with A too. It makes sense that the state machine is ready by the time the last state ends.

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Herschel

9 months ago

I think it's C. The state machine is ready to accept events by the time the object has finished its initialization.

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Bettina

9 months ago

I agree, A is the correct answer. The state machine is indeed created by the time the last state ends.

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Hillary

10 months 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.

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Nikita

9 months 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.

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Sharita

9 months 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.

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Melda

9 months ago

I think it's actually C. The state machine should be ready once the object has finished its initialization.

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Hana

10 months 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.

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Eileen

8 months 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.

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