ITPEC IP April 2023 Question 95
ITPEC IP April 2023 — Question 95 of 100
A DFD, data flow diagram, focuses on how data moves through a system and how processes transform it. Its principal elements are external entities, processes, data stores, and data flows. It models the logical movement and processing of data without describing program control timing or object implementation details.
Answer (d)
Why not others:
- (a) describes a state transition diagram
- (b) describes an entity-relationship diagram for data entities and their relationships
- (c) describes an object or class-oriented representation containing attributes, operations, and relationships
Key rule: DFD follows data through processes; ERD models stored entities, a state diagram models changing states, and a class diagram models object structure and behavior.
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