ITPEC FE Subject A October 2025 Question 34
ITPEC FE Subject A October 2025 — Question 34 of 60
UML Use Case Diagram — shows how actors interact with a system.
A use case diagram displays:
- Actors — external users or systems
- Use cases — scenarios of interaction with the system
- Relationships between actors and use cases
Why not others:
- (a) — describes a state machine diagram (finite state transitions of an object)
- (b) — describes a sequence diagram (message exchange along lifelines over time)
- (c) — describes an activity diagram (flow between activities in a process)
Key rule: Use case diagram = actors (stick figures) + use cases (ovals) + system boundary.
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