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System Analysis and Design - Section 3 Multiple Questions and Answers.
| 21. | The Data flow diagram (DFD) shows; | ||
| A. | the flow of data | ||
| B. | the processes | ||
| C. | the areas where they are stored. | ||
| D. | All of the above | ||
| 22. | In data-flow diagrams, an originator or receiver of the data is usually designated by | ||
| A. | a circle | ||
| B. | an arrow | ||
| C. | a square box | ||
| D. | a rectangle | ||
| 23. | A data flow diagram is | ||
| A. | the modern version of flowchart | ||
| B. | mainly used at the systems specification stage. | ||
| C. | the primary output of the systems design phase | ||
| D. | All of the above | ||
| 24. | Environment in systems parlance refers to | ||
| A. | a sub-system | ||
| B. | the boundary | ||
| C. | a part outside the boundaries | ||
| D. | All of the above | ||
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