ITPEC IP April 2021 Question 94
ITPEC IP April 2021 — Question 94 of 100
A DFD focuses on data flow and its relationship to business-data processing. A Data Flow Diagram shows external entities, processes, data stores, and directed flows, helping analysts understand how information enters, is transformed, is stored, and leaves a system.
Answer (d)
Why not others:
- state transitions are shown by a state-transition diagram
- entities and data structure are modeled by an ER diagram
- attributes, operations, and relationships among structural elements are modeled by a class diagram
Key rule: DFD models movement and transformation of data, not timing, state changes, or object structure.
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