IREB Certified Professional for Requirements Engineering – Foundation Level — Question 10

In order to document a door system for a underground railway system, the following activity diagram has been modelled. You reconcile this diagram with your notes.
Which two of the following notes were not represented in the diagram? (Choose two.)

Answer options

• A. Double pressing of the door button countermands the currently running action.
• B. The tread is pulled in once the door is closed.
• C. The light-emitting diode is deactivated at the end of the process.
• D. If the door is open, it is subsequently closed.
• E. If the door is closed, it is subsequently opened.

Correct answer: A, C

Explanation

The correct answers are A and C because the diagram does not indicate that double pressing the button cancels the current action, nor does it show that the light-emitting diode is deactivated at the end. Options B, D, and E are represented in the diagram, covering the actions of the door opening and closing.