Exam 5: Data and Process Modeling

When a context diagram is expanded into DFD diagram 0, all the connections that flow into and out of process 0 must be retained.

In a DFD, a process symbol can have only one outgoing data flow.

Whether to use a decision table or a decision tree often is a matter of personal preference.

A(n) ____________________ uses various symbols to show how the system transforms input data into useful information.

MATCHING Identify the letter of the choice that best matches the phrase or definition.a.balancing f.data dictionary b.structured analysis g.decision table c.leveling h.logical d.DFD i.data flow e.physical j.record -A set of DFDs produces a logical model of the system, but the details within those DFDs are documented separately in a data dictionary, which is the second component of this.

In a data dictionary, a(n) ____ is the smallest piece of data that has meaning within an information system.

Leveling also is called ____.

During the systems design phase, a physical model of the new information system is created that follows from the logical model and involves operational tasks and techniques.

In most data dictionaries, records are defined together with the data flows and data stores.

Systems analysts call an entity that receives data from the system a source.

A spontaneous generation process is a process that has ____.

When structured English is used, which of the following rules must be conformed to?

One of the firm's beginner analysts is working on a financial process that will continue to print vendor payments until it reaches the end of the file. Which of the following processes will Evan suggest that the analyst use?

MATCHING Identify the letter of the choice that best matches the phrase or definition.a.balancing f.data dictionary b.structured analysis g.decision table c.leveling h.logical d.DFD i.data flow e.physical j.record -With this, an analyst starts with an overall view, which is a context diagram with a single process symbol.

MATCHING Identify the letter of the choice that best matches the phrase or definition.a.balancing f.data dictionary b.structured analysis g.decision table c.leveling h.logical d.DFD i.data flow e.physical j.record -Ensures that the input and output data flows of the parent DFD are maintained on the child DFD.

-Typical process description tools include ____.

____ is/are logically impossible in a DFD because a process must act on input, shown by an incoming data flow, and produce output, represented by an outgoing data flow.

-The accompanying figure illustrates symbols used in a(n) ____________________, which shows how data moves through an information system but does not show program logic or processing steps.

A data ____ is a central storehouse of information about a system's data.

-Among the symbols in the accompanying figure, a(n) ____________________ receives input data and produces output that has a different content, form, or both.