ITPEC FE Subject A October 2025 Question 48
ITPEC FE Subject A October 2025 — Question 48 of 60
A Data Flow Diagram (DFD) shows how information flows between processes, data stores, and external entities. In this scenario, marketing managers (external entity) feed customer data into internal processes (campaign design, email targeting), which read/write to data stores (customer interests, sales patterns).
Why not others:
- (a) Class Diagram — UML diagram showing classes, attributes, methods, and inheritance; describes code structure, not data movement
- (c) Entity-Relationship Diagram (ERD) — models database tables and their relationships (PK/FK), not data flow between processes
- (d) Use Case Diagram — UML diagram showing actors and system functions (what users can do), not how data moves internally
Key rule: If the question mentions "information flows," "processes," "data stores," and "external entities" together — the answer is DFD.
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
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