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Question
Which of the following is a true statement?A) A data model explains what the organization does and what rules govern how work is done in the organization.
B) To construct a data model, you need to know how data are processed.
C) To construct a data model, you need to know when data are processed.
D) A data flow diagram graphically illustrates the structure and relationships among data items.
E) During conceptual data modeling, the preparation of a Network diagram is necessary.
Answer
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A square on a data-flow diagram represents a sink or a:
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