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Exam 5: Data and Process Modeling

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Question 41

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In a data dictionary, some data elements have ____ rules, such as an employee's salary must be within the range defined for the employee's job classification.

A) domain
B) range
C) validity
D) mastered

E) C) and D)
F) A) and B)

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Question 42

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A disadvantage of the four-model approach is that the requirements of a new information system always are quite different from the current information system, especially when the proposal is based on new computer technology rather than a large number of new requirements.

A) True
B) False

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Question 43

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In a DFD, the Gane and Sarson symbol for a data flow is a ____.

Because diagram 0 is a(n) ____ version of process 0, it shows considerably more detail than a context diagram.

A DFD shows the structure and detailed contents of a data flow.

When documenting a process, the documentation includes a description of the process's characteristics and, for functional primitives, a process description, which is a model that documents the processing steps and business logic.

To show the detail inside a black box, create DFD ____________________, which zooms in on the system and shows major processes, data flows, and data stores.

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.

-____ is based on combinations of the three logical structures, or control structures (one of which is shown in the accompanying figure) , which serve as building blocks for the process.

In a data dictionary, ____ refers to whether the data element contains numeric, alphabetic, or character values.

If processes must be performed in a specific sequence, you document the information in the ____.

When DFDs are drawn, which of the following conventions should be followed?

-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.

The major benefit of ____ is that it gives a clear picture of current system functions before any modifications or improvements are made.

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

MATCHING Identify the letter of the choice that best matches the phrase or definition. -A data structure that contains a set of related data elements that are stored and processed together.

In a DFD, a data flow must have a process symbol on at least one end.

In a DFD, processes contain the business logic, also called business rules, that transform the data and produce the required results.

Deciding whether to explode a process further or determine that it is a functional primitive is a matter of experience, judgment, and interaction with programmers who must translate the logical design into code.

To draw a context diagram, you start by placing a single process symbol in the center of the page, which you identify as ____________________.