ITPEC FE Morning April 2020 Question 46
ITPEC FE Morning April 2020 — Question 46 of 80
UML Use Case Diagram — shows system functionality from the actors' perspective.
A use case diagram displays what a system does as seen by actors (external users or machines), representing interaction scenarios.
Why not others:
- (a) — describes a state machine diagram (finite state transitions during object lifecycle)
- (b) — describes a sequence diagram (message exchange among objects along a timeline)
- (c) — describes an activity diagram (flow from one activity to another)
Key rule: Use case = who (actor) does what (use case) with the system.
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