The relation between use cases and data flow diagrams is generally:
A)Use cases are developed by users and data flow diagrams are developed by systems analysts
B)Data flow diagrams are developed first and then use cases ensue
C)Use cases are developed first and then data flow diagrams ensue
D)Use cases show logical processes,while data flow diagrams show physical processes
E)There is not a relationship between use cases and data flow diagrams

Question

Quizplus · Accepted Answer

Use cases are developed first to identify functional requirements and then data flow diagrams are developed to show how data flows between different components in the system. Use cases help in identifying the input and output data required by the system, which are shown in data flow diagrams as data flows. Therefore, use cases and data flow diagrams are closely related and used together in system analysis and design.

The Relation Between Use Cases and Data Flow Diagrams Is