Question 1

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 2

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 refers to data that is actively flowing or being transferred from one place to another within a system. This process of data movement is symbolized by a data flow in data flow diagrams. Therefore, the correct answer is data flow (option D). Data store (option A) refers to a place where data is stored and not in motion. Process (option B) refers to an action performed on data that may or may not involve movement of data. Source (option C) refers to the origin of data but not to the movement of data. Relationship (option E) refers to the association or connection between different elements in a system and does not relate to data movement.

Question 3

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 a visual representation of the system's scope, showing what elements are inside and outside the system. It is the highest level of diagram in the systems development process and provides a broad overview of the system's boundaries and interfaces. Level-2 diagrams and decomposition diagrams are lower-level diagrams that show the internal components of the system, while referencing diagrams and representative diagrams are not commonly used in this context.

Question 4

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 student data on an enrollment form would be represented as a data flow in a data-flow diagram, as it represents the movement of data between processes, data stores, and external entities.

Question 5

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 are used to show how data moves through an information system, including inputs, processing, and outputs. They are a modeling tool used to represent the flow and transformation of data within a system, helping to identify areas of inefficiency or potential improvement. While they may also depict the sequencing of activities and relationships among entities, their primary purpose is to illustrate data flow. Therefore, the best choice is B.

Question 6

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

Accepted Answer

These are indeed guidelines for drawing DFDs. Completeness refers to including all necessary processes, data stores, and flows. Consistency requires that the DFD is logically accurate and conforms to any existing standards. Timing requires that the DFD represents the right sequence of events. Iterative development suggests that the DFD can be refined and improved over time. Primitive DFDs are simple diagrams that are gradually refined into more complex ones.

Question 7

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 data store represents a place where data is stored or kept for future use. In this case, the file folder containing orders serves as a storage for orders and is represented as a data store in the diagram.

Question 8

As a rule of thumb, no data-flow diagram should have more than about seven processes on it.

Accepted Answer

This guideline is based on the cognitive limit of humans to process information, often referred to as the "seven plus or minus two" rule, which suggests that people can only hold about 7 items in their working memory at once.

Question 9

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 10

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

Process modeling involves creating a graphical representation of the processes involved in capturing, manipulating, storing, and distributing data within a system and between the system and its environment. It helps to understand the flow of data and identify areas of improvement in the system. Data modeling is focused on designing the structure and relationships of data, while structure modeling is concerned with the organization and composition of the system's architecture. Transition modeling is used to depict the movement of a system from one state to another during a process, and logic modeling is focused on the rules and conditions that govern the behavior of a system. Therefore, process modeling is the best choice in this scenario.

Question 11

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

Accepted Answer

Data-flow diagrams are commonly used in business process reengineering as they provide a visual representation of how data flows through a system or process. They are useful tools for identifying areas of inefficiency and designing more streamlined processes.

Question 12

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 is true. When breaking down a composite data flow into component data flows, all data must be accounted for and no new data can be added.

Question 13

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 14

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 not a process modeling deliverable as it pertains to data modeling and depicts the relationships between entities in a system. The other options are all deliverables in process modeling, including a context diagram (which shows the system as a whole), DFD components (that break down the system into smaller parts), DFDs of the current and new logical systems (which show the flow of data through the system).

Question 15

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

A data-flow diagram represents data movement, and a customer order form would be depicted as a data flow, showing the transfer of data between processes, sources, and sinks.

Question 16

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 would include the composition or list of data elements contained in the data flow. This information helps in understanding the data flow and its dependencies.

Question 17

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 more detailed version of the level-0 diagram, so it would be a violation of consistency to have a level-1 diagram without a corresponding level-0 diagram.

Question 18

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 19

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 data that is stored or saved in a data store, such as a database, file server, or other storage device. Choice B (data store) is the best choice that fits the description.

Question 20

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...

Quiz 6: Structuring System Requirements: Process Modeling

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

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

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

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

Data-flow diagrams allow you to:

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

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

As a rule of thumb, no data-flow diagram should have more than about seven processes on it.

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

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: