ITPEC FE Morning October 2022 Question 45
ITPEC FE Morning October 2022 — Question 45 of 80
UML Use Case Diagram — identifies how actors interact with a system.
A use case diagram shows:
- Actors — external users or machines that interact with the system
- Use cases — scenarios describing what the system does for those actors
- Relationships — associations between actors and use cases
Why not others:
- (a) State machine diagram — shows object behavior through finite state transitions
- (b) Sequence diagram — shows message exchange among objects along lifelines in time order
- (c) Activity diagram — shows flow from one activity to another in a system or business process
Key rule: Use case diagram = who uses the system and what they do with it.
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