A data flowchart is a tool that describes ()an information system
A. The physical model
B. The logical model
C. Optimize the model
D. The decision model
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In a data flowchart, what is not controlled by the system described is ( )
A. Processing capabilities
B. Data storage
C. External entities
D. The data stream
Data flowcharts are drawn using ( )
A. Bottom-up approach
B. Top-down method
C. The method from thin to thick
D. It's all right
Notes for drawing data flowcharts do not include ()
A. The data stream must be processed
B. Top down, layer by layer, to maintain balance
C. Data storage takes into account the media characteristics and technical means of memory
D. Naming should pay attention to the specification
The following incorrect description of the data flowchart is ( )
A. The data flowchart describes the data connection and processing functions between the various parts of the system
B. The data flow chart is suitable for comprehensive, intuitive and macro description of the information flow of the system
C. Data flowcharts reflect data flow, data processing, and logical data storage
D. The data flowchart reflects the judgment and control conditions of the interrelation between the various parts of the system
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