Regarding the drawing of data flowcharts, the following description is correct ()
A. For decomposition processing, the input data stream is usually drawn first, and then the output data stream is drawn
B. There is no new data flow in the next layer of the diagram that does not belong to the data flow children in the upper layer diagram
C. Basic processing has no parent and no children
D. It is up to the user to draw
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Regarding the data dictionary, which of the following narratives is incorrect is ()
A. The role of a data dictionary is to define each component on a data flowchart
B. Data flowcharts and data dictionaries are the main tools for describing the logical model of the system
C. Data dictionaries can only be written manually
D. Writing a data dictionary should conform to the specification
Tools describing basic processing logic functions do not include ()
A. Structured language
B. The decision table
C. Decision tree
Data flowchart
Arrows with names in the data flowchart indicate ()
A. Controls the order in which programs are executed
B. The call relationship between modules
C. The flow of data
D. The composition of the program
Data dictionary is one of the important tools () in the software requirements analysis stage.
A. The data definition
B. Data maintenance
C. Data communication
Database design
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