Which statement best describes the tail end of a create message?

Which statement best describes the tail end of a create message?

• A. It is connected to the sending lifeline
• B. It is connected to the head of the created lifeline
• C. It is connected to the tail of the sending lifeline
• D. It is connected to the arrowhead end

Answer: (A)

In a UML sequence diagram, a create message starts from the sender lifeline and creates a new lifeline at the destination end. The tail—the starting point of the message—remains on the sending lifeline, while the arrowhead points to the newly created lifeline. So the tail end is connected to the sending lifeline. The created lifeline appears where the head ends, reflecting the new object that results from the message. The other descriptions would misstate which end sits on the sender or which end points to the new lifeline.

In a UML sequence diagram, a create message starts from the sender lifeline and creates a new lifeline at the destination end. The tail—the starting point of the message—remains on the sending lifeline, while the arrowhead points to the newly created lifeline. So the tail end is connected to the sending lifeline. The created lifeline appears where the head ends, reflecting the new object that results from the message. The other descriptions would misstate which end sits on the sender or which end points to the new lifeline.