What is the notation of an accept event action?

What is the notation of an accept event action?

• A. Concave pentagon that looks like a rectangle with a triangular notch cut out on one side.
• B. Convex pentagon shaped like a signpost.
• C. Round-angle with this name string: <action> : <Behavior>.
• D. A dashed line with an open arrowhead.

Answer: (A)

The symbol being tested is the one used for an Accept Event Action in UML activity/state diagrams. This action waits for and handles a specific event, and its icon is a concave pentagon—a rectangle with a triangular notch cut out on one side. This notch distinguishes it from other action types, signaling that the node accepts events rather than initiating behavior with a rounded-rectangle shape. Why this fits best: In UML notation, different action types use distinct shapes to convey their role. The concave pentagon is specifically designated for Accept Event Action, making it the correct choice for representing an action that waits for and processes an event. Why the other shapes don’t fit: A convex pentagon resembling a signpost isn’t a standard symbol for Accept Event Action. A rounded rectangle with a name like "action : Behavior" describes a Call Behavior Action or a generic action node, not the accept-event kind. A dashed line with an open arrowhead is a dependency indicator, not an action node in itself.

The symbol being tested is the one used for an Accept Event Action in UML activity/state diagrams. This action waits for and handles a specific event, and its icon is a concave pentagon—a rectangle with a triangular notch cut out on one side. This notch distinguishes it from other action types, signaling that the node accepts events rather than initiating behavior with a rounded-rectangle shape.

Why this fits best: In UML notation, different action types use distinct shapes to convey their role. The concave pentagon is specifically designated for Accept Event Action, making it the correct choice for representing an action that waits for and processes an event.

Why the other shapes don’t fit: A convex pentagon resembling a signpost isn’t a standard symbol for Accept Event Action. A rounded rectangle with a name like "action : Behavior" describes a Call Behavior Action or a generic action node, not the accept-event kind. A dashed line with an open arrowhead is a dependency indicator, not an action node in itself.