Question 1

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.

Accepted Answer

This is true. Having too many processes on a data-flow diagram can make it confusing and difficult to read. It is recommended to break up larger systems into smaller diagrams with fewer processes.

Question 2

DFD cohesion means your DFDs include all of the necessary components for the system you are modeling.

Accepted Answer

The answer of DFD cohesion means your DFDs include all...

Question 3

To date, data-flow diagrams have not been useful tools for modeling processes in business process reengineering.

Accepted Answer

Data-flow diagrams have been useful tools for modeling processes in business process reengineering.

Question 4

A composite data flow on one level can be split into component data flows at the next level, but no new data can be added and all data in the composite must be accounted for in one or more subflows.

Accepted Answer

This statement accurately describes the principle of decomposition in data flow diagrams, where higher-level data flows are broken down into smaller component data flows while ensuring that no new data is introduced and all data in the original flow is accounted for in the subflows.

Question 5

Data in motion, moving from one place in a system to another, best describes a:
A) data store.
B) process.
C) source.
D) data flow.
E) relationship.

Accepted Answer

Data in motion is best described as a data flow, which refers to the movement of data from one point to another within a system. Data stores refer to where data is held for long-term storage, processes refer to actions or transformations performed on data, sources refer to where data originates from, and relationships refer to the connections between data elements.

Question 6

Data-flow diagrams allow you to:
A) show the timing of data flows.
B) model how data flow through an information system.
C) demonstrate the sequencing of activities.
D) show the relationship among entities.
E) represent the internal structure and functionality of processes.

Accepted Answer

Data-flow diagrams specifically model how data flows through an information system. While they may indirectly show timing, sequencing, entity relationships, and process structure, their primary purpose is to depict the flow of data.

Question 7

The diagram that shows the scope of the system, indicating what elements are inside and outside the system, is called a:
A) context diagram.
B) level-2 diagram.
C) referencing diagram.
D) representative diagram.
E) decomposition diagram.

Accepted Answer

A context diagram is specifically designed to show the scope of the system by illustrating what elements are inside and outside of it. Additionally, it provides an overview of the system's functionality and how it interacts with external entities. The other options (B-E) do not specifically refer to this type of diagram.

Question 8

A file folder containing orders would be represented on a data-flow diagram as a:
A) process.
B) source.
C) data flow.
D) data store.
E) relationship.

Accepted Answer

A file folder containing orders would be considered a data store on a data-flow diagram, as it is a repository for data that can be used and accessed by processes or data flows within the system.

Question 9

Student data contained on an enrollment form would be represented on a data-flow diagram as a:
A) process.
B) data flow.
C) source.
D) data store.
E) relationship.

Accepted Answer

The answer of Student data contained on an enrollment form...

Question 10

One of the primary purposes of a DFD is to represent time, giving a good indication of whether data flows occur constantly in real time, once a day, or once a year.

Accepted Answer

The answer of One of the primary purposes of a...

Question 11

Which of the following is NOT a process modeling deliverable?
A) A context data-flow diagram
B) Thorough descriptions of each DFD component
C) DFDs of the current physical system
D) An entity relationship diagram
E) DFDs of the new logical system

Accepted Answer

An entity relationship diagram is a deliverable in data modeling, not process modeling.

Question 12

Completeness, consistency, timing, iterative development, and primitive DFDs are guidelines for drawing DFDs.

Accepted Answer

These are indeed guidelines for drawing DFDs.

Question 13

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

Accepted Answer

The answer of Coupling is the conservation of inputs and...

Question 14

Data at rest, which may take the form of many different physical representations, best describes a:
A) source.
B) data store.
C) data flow.
D) process.
E) relationship.

Accepted Answer

Data at rest refers to stored data that is not being actively moved or processed. This best describes a data store, which is a repository for holding and organizing data for future use.

Question 15

Structured analysis is the process of discovering discrepancies between two or more sets of data-flow diagrams or discrepancies within a single DFD.

Accepted Answer

The answer of Structured analysis is the process of discovering...

Question 16

Data contained on a customer order form would be represented on a data-flow diagram as a:
A) process.
B) data flow.
C) source.
D) sink.
E) relationship.

Accepted Answer

The customer order form contains data that flows from the customer to the system, hence it is represented as a data flow in the data-flow diagram.

Question 17

A data flow repository entry would include the composition or list of data elements contained in the data flow.

Accepted Answer

A data flow repository entry includes information about the data elements contained in the data flow, such as their names and data types.

Question 18

Graphically representing the processes that capture, manipulate, store, and distribute data between a system and its environment and among components within a system refers to:
A) data modeling.
B) structure modeling.
C) process modeling.
D) transition modeling.
E) logic modeling.

Accepted Answer

Graphically representing the processes that capture, manipulate, store, and distribute data between a system and its environment and among components within a system refers to process modeling. Data modeling refers to representing system data and its relationships. Structure modeling refers to representing the organization of a system's components. Transition modeling refers to representing the flow of control between a system's components. Logic modeling refers to the representation of a system's decision-making processes.

Question 19

Since data-flow diagrams concentrate on the movement of data between processes, these diagrams are often referred to as:
A) process models.
B) data models.
C) flow models.
D) flow charts.
E) logic models.

Accepted Answer

The answer of Since data-flow diagrams concentrate on the movement...

Question 20

A gross violation of DFD consistency would be a level-1 diagram with no level-0 diagram.

Accepted Answer

A level-1 diagram is a detailed view of a specific process within a level-0 diagram. Therefore, it should always be accompanied by a level-0 diagram that provides an overview of the entire system. If a level-1 diagram is created without a corresponding level-0 diagram, it would be a gross violation of DFD consistency.

Quiz 6: Structuring System Requirements: Process Modeling

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.

DFD cohesion means your DFDs include all of the necessary components for the system you are modeling.

To date, data-flow diagrams have not been useful tools for modeling processes in business process reengineering.

A composite data flow on one level can be split into component data flows at the next level, but no new data can be added and all data in the composite must be accounted for in one or more subflows.

Data in motion, moving from one place in a system to another, best describes a:

Data-flow diagrams allow you to:

The diagram that shows the scope of the system, indicating what elements are inside and outside the system, is called a:

A file folder containing orders would be represented on a data-flow diagram as a:

Student data contained on an enrollment form would be represented on a data-flow diagram as a:

One of the primary purposes of a DFD is to represent time, giving a good indication of whether data flows occur constantly in real time, once a day, or once a year.

Which of the following is NOT a process modeling deliverable?

Completeness, consistency, timing, iterative development, and primitive DFDs are guidelines for drawing DFDs.

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

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

Structured analysis is the process of discovering discrepancies between two or more sets of data-flow diagrams or discrepancies within a single DFD.

Data contained on a customer order form would be represented on a data-flow diagram as a:

A data flow repository entry would include the composition or list of data elements contained in the data flow.

Graphically representing the processes that capture, manipulate, store, and distribute data between a system and its environment and among components within a system refers to:

Since data-flow diagrams concentrate on the movement of data between processes, these diagrams are often referred to as:

A gross violation of DFD consistency would be a level-1 diagram with no level-0 diagram.