Question

What does an association line with an arrowhead between an actor and a use case represent in a use case diagram?
Association
Generalization
Include
Extend

Answer 1

Association
In a use case diagram, an association line with an arrowhead between an actor and a use case represents an association between the actor (external entity) and the use case (functionality or behavior of the system). It denotes that the actor is involved in or interacts with the described use case in the system.