Question 1

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

Accepted Answer

This is true. In a DFD, a data store is only shown when it is used by two or more processes. If it is only used by one process, the data store is not shown in the diagram.

Question 2

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.

Accepted Answer

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

Question 3

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

Accepted Answer

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

Question 4

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, both the characteristics of the process and a process description, which includes a model documenting processing steps and business logic for functional primitives, should be included.

Question 5

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

Accepted Answer

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

Question 6

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.

Accepted Answer

In a Data Flow Diagram (DFD), the higher-level diagram is referred to as the parent diagram, and the lower-level diagram is called the child diagram.

Question 7

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

Accepted Answer

Data dictionaries typically define data elements, attributes, and relationships, but not the data flows and data stores, which are usually part of data flow diagrams.

Question 8

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

Accepted Answer

In modular design, each module should ideally have a single entry and exit point to ensure simplicity, maintainability, and ease of understanding.

Question 9

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.

Accepted Answer

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

Question 10

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.

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

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 includes operational tasks and techniques.

Question 13

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

This statement is true. The decision to further decompose a process or consider it a functional primitive is based on the experience and judgment of the design team and their interaction with programmers who will translate the design into code. There is no hard and fast rule for determining when a process should be further decomposed or not.

Question 14

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.

Accepted Answer

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

Question 15

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 in system analysis and design, where the physical model represents the actual components and infrastructure of the system, and the logical model represents the functional and data flow aspects of the system. By creating a logical model of the current system, analysts can identify issues and areas for improvement before developing a logical model of the new and improved system.

Question 16

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

Accepted Answer

Decision tables and decision trees are both tools used for decision-making and can often be chosen based on the user's preference, as they serve similar purposes but present information differently.

Question 17

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

Accepted Answer

Balancing DFDs involves ensuring that input and output data flows are consistent between different levels of diagrams, not just numbering processes.

Question 18

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 only the description of each data element, data flow, data store, record, entity, and process but also the relationships among them.

Question 19

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

Accepted Answer

This statement is incorrect. More complex systems typically have more processes and components, which makes it challenging for analysts to identify functional primitives.

Question 20

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

Quiz 5: Data and Process Modeling