Correct option is B
A
Dataflow Diagram (DFD) is used in systems analysis to illustrate how data flows through a system, showing inputs, processes, and outputs. It is a tool for visualizing data movement and identifying inefficiencies or bottlenecks in the system.
Important Key Points:
1.
Purpose of DFD: Represents the flow of data between processes, data stores, and external entities.
2.
System Development: Commonly used in the analysis and design phases of software development.
3.
Levels: DFDs can range from high-level (context diagrams) to detailed levels.
Knowledge Booster:
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System Flowchart: Focuses on the sequence of operations in a system, not data flow.
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Data Logic Chart: Not a standard tool in systems analysis.
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DFD Symbols: Circles represent processes, arrows indicate data flow, rectangles denote external entities, and open-ended rectangles represent data stores.