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OMG Exam OMG-OCUP2-FOUND100 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:

How many activities can feed an initial node at the beginning of an activity thread?

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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.


Contribute your Thoughts:

Michel
11 days ago
B seems like the right choice. 0..* means the initial node can have any number of activities, which sounds about right.
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Elina
14 days ago
C is the correct answer. An initial node can only have one activity feeding it, not multiple.
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Glenn
16 days ago
I think the answer is D. 1..* makes the most sense since an initial node should have at least one activity to start the thread.
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Lindsey
4 days ago
I think it's C) 1, because there should be exactly one activity to start the thread.
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Corrinne
7 days ago
I agree, D) 1..* is the correct answer.
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