ITPEC IP April 2018 Question 94
ITPEC IP April 2018 — Question 94 of 100
A data flow diagram focuses on how data moves among external entities, processes, and data stores. It describes the relationships between business-data flows and the processing that transforms or uses that data, without emphasizing timing or implementation details.
Answer (d)
Why not others:
- state transitions over events or time are shown by a state-transition diagram
- relationships among data entities are modeled with an ER diagram
- attributes, operations, and relationships of system elements are modeled with a class diagram
Key rule: DFD notation uses processes, data flows, data stores, and external entities to model functional data movement.
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