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Question
When modeling a many-to-many unary relationship, the primary key of the relation representing the relationship is always singular.Answer
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Structured analysis techniques, such as data-flow diagramming, can help companies avoid misunderstanding how existing systems will have to work with the new system and incorrect specifications for necessary data, forms, and reports.
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When you believe that you have shown each business form or transaction, computer screen, and report as a single data flow, you have probably reached the:
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D) secondary-level diagrams.
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If an input from a source appears on a level-0 diagram, it must:
A) appear on the context diagram.
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C) be connected to a sink.
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Which of the following is a true statement regarding data flows?
A) A data flow to a data store means retrieve or use.
B) A data flow from a data store means update.
C) A data flow may have double-ended arrows.
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Which of the following is true regarding the context diagram?
A) The process symbol is labeled "0."
B) The context diagram contains two processes.
C) Data stores must be shown on the context diagram.
D) The internal workings of the system are shown on the context diagram.
E) The context diagram organizes the processes in a tree-like structure.
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A square on a data-flow diagram represents a sink or a:
A) data flow.
B) data store.
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D) predecessor.
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The shape of a data-flow (DFD) diagramming process is a(n):
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C) rectangle.
D) rounded rectangle.
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A supplier of auto parts to your company would be represented on a data-flow diagram as a:
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Data contained on a customer order form would be represented on a data-flow diagram as a:
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A process has a verb label.
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On a data-flow diagram, a rectangle with the right vertical line missing represents a data store.
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On a data-flow diagram, a diamond represents a process.
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Briefly identify and describe the participants of a JAD session.