Exam 6: Structuring System Requirements: Process Modeling

Because a data flow name represents a specific set of data, another data flow that has even one more or one less piece of data must be given a different, unique name.

As a rule of thumb, no data-flow diagram should have more than about seven processes on it, because the diagram would be too crowded and difficult to understand.

If an input from a source appears on a level-0 diagram, it must:

Data at rest, which may take the form of many different physical representations, best describes a:

A data flow can go directly back to the same process it leaves.

The part of a decision table that links conditions to actions is the section that contains the:

The extent to which information contained on one level of a set of nested data-flow diagrams is also included on other levels refers to:

A Web site's customer is represented as a source on a data-flow diagram.

Match each of the data-flow diagramming symbols with corresponding examples.(Answers may occur more than once.) -Supplier

Match each of the following terms with its description. -The work or actions performed on data so that they are transformed, stored, or distributed

The origin and/or destination of data, sometimes referred to as external entities defines:

Coupling is the conservation of inputs and outputs to a data-flow diagram process when that process is decomposed to a lower level.

The decomposition of Process 1.1 would be shown on a level-1 diagram.

For each of the following statements, answer "a" if the statement is a true data-flow diagramming rule, and answer "b" if the rule is false. -Data can move directly from one data store to another data store.

For each of the following statements, answer "a" if the statement is a true data-flow diagramming rule, and answer "b" if the rule is false. -A process must have both inputs and outputs.

Assume we have placed a data store between Process 5.1 and Process 5.5; we would say that these processes are decoupled.

What is meant by DFD completeness? What is meant by DFD consistency?

If a data flow appears on the context diagram and is also represented on a level-0 diagram, this would be referred to as:

Discuss the guidelines for drawing a DFD.

On a data-flow diagram, a check and payment coupon mailed to the company is represented as a data store.