What is the difference between a context diagram a logical, Software Engineering

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What is the difference between a context diagram a logical

1. What is the difference between a context diagram, a logical DFD, and a physical DFD?

2. What is a systems flowchart?

3. What are the similarities and differences between a systems flowchart and a DFD?

4. Distinguish the aspects of systems depicted by DFDs from those depicted by E-R diagrams.

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