Question 1

Analysts use ____________________ modeling techniques to show how a system transforms data into useful information.

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The answer of Analysts use ____________________ modeling techniques to show...

Question 2

When a DFD is exploded, the higher-level diagram is called the child diagram, and the lower-level diagram is referred to as the parent diagram.

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The answer of When a DFD is exploded, the higher-level...

Question 3

DFDs are balanced if each internal process is numbered to show that it is a child of the parent process.

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The answer of DFDs are balanced if each internal process...

Question 4

Two DFDs are leveled, for example, if the child diagram at the bottom has the same input and output flows as the parent process at the top of the diagram.

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The answer of Two DFDs are leveled, for example, if...

Question 5

More complex systems have fewer processes, and analysts need only work through very few levels to identify the functional primitives.

Accepted Answer

This statement contradicts the general principle of systems analysis, which states that more complex systems have more processes and require more levels of analysis to identify functional primitives.

Question 6

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.

Accepted Answer

This statement is true. When documenting a process, it is important to include a description of its characteristics as well as a process description, which details the specific steps and logic involved in completing the process.

Question 7

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.

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The answer of A disadvantage of the four-model approach is...

Question 8

Many systems analysts create a physical model of the current system and then develop a logical model of the current system before tackling a logical model of the new system.

Accepted Answer

This is a common approach followed by many systems analysts. They first create a physical model of the current system (which shows the physical components and their relationships) and then use it to develop a logical model (which shows the logic and flow of the system). This helps them understand the current system better before moving on to designing the new system.

Question 9

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

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The answer of In most data dictionaries, records are defined...

Question 10

In addition to the Gane and Sarson symbol set, another popular symbol set is ____________________.

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The answer of In addition to the Gane and Sarson...

Question 11

When drawing DFDs, a data store is shown only when two or more processes use the data store.

Accepted Answer

This is a key principle of drawing DFDs. Data stores should only be included when multiple processes interact with the same data store.

Question 12

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.

Accepted Answer

Explaining the decision to further explode a process or determine it as a functional primitive requires experience, judgment, and communication with programmers who will code the logical design. Therefore, the statement is true.

Question 13

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.

Accepted Answer

During the systems design phase, a physical model is created based on the logical model, which involves understanding the operational tasks and techniques needed for the system to function.

Question 14

In modular design, a rectangle represents a condition or decision, a diamond shape represents a step or a process, and the logic follows the lines in the direction indicated by the arrows.

Accepted Answer

In modular design, a rectangle represents a step or process, and a diamond shape represents a condition or decision. The logic follows the lines in the direction indicated by the arrows.

Question 15

In DFDs, a process resembles a(n) ____________________, where the inputs, outputs, and general functions of the process are known, but the underlying details are not shown.

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The answer of In DFDs, a process resembles a(n) ____________________,...

Question 16

In addition to describing each data element, data flow, data store, record, entity, and process, the data dictionary documents the relationships among these components.

Accepted Answer

The data dictionary documents not just the components but also their relationships with each other.

Question 17

In a typical company, ____________________ might include calculating sales trends, filing online insurance claims, ordering inventory from a supplier's system, or verifying e-mail addresses for Web customers.

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The answer of In a typical company, ____________________ might include...

Question 18

In modular design, each logical structure must have multiple entry and exit points.

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The answer of In modular design, each logical structure must...

Question 19

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

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The answer of A(n) ____________________ uses various symbols to show...

Question 20

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

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The answer of Whether to use a decision table or...

Quiz 5: Data and Process Modeling