Question 1

Assume shipment data are entered into a logbook once shipments are received at the company's warehouse; the logbook is represented on a data-flow diagram as a sink.

Accepted Answer

False

Question 2

When constructing data-flow diagrams, you should show the interactions that occur between sources and sinks.

Accepted Answer

False

Question 3

Data-flow diagrams (DFD) illustrate important concepts about the movement of data.

Accepted Answer

Data-flow diagrams (DFD) are used to depict the flow of data within a system or a process. They help illustrate the movement of data, how it is transformed, stored, and used in a system. Therefore, the statement is true.

Question 4

On a data-flow diagram, a check and payment coupon mailed to the company is represented as a data store.

Accepted Answer

A check and payment coupon mailed to the company is represented as an external entity or data flow, not a data store, on a data-flow diagram.

Question 5

The data a sink receives and often what data a source provides are fixed.

Accepted Answer

The answer of The data a sink receives and often...

Question 6

Structured analysis techniques, such as data-flow diagramming, can help companies avoid misunderstanding how existing systems will have to work with the new system and incorrect specifications for necessary data, forms, and reports.

Accepted Answer

Structured analysis techniques, such as data-flow diagramming, are used to avoid misunderstandings and ensure accurate specifications in system development.

Question 7

A data flow represents data in motion, moving from one place in the system to another.

Accepted Answer

A data flow diagram (DFD) is a graphical representation of the flow of data through an information system. It shows how data enters and exits the system, where it is stored, how it is processed, and where it goes. Data flows represent the movement of data between processes or stores in the system.

Question 8

Sources and sinks are internal to the system.

Accepted Answer

The answer of Sources and sinks are internal to the...

Question 9

A Web site's customer is represented as a source on a data-flow diagram.

Accepted Answer

A customer is considered an external entity and is represented as a source or sink on a data-flow diagram.

Question 10

The calculation of a student's grade is represented on a data-flow diagram as a data flow.

Accepted Answer

The answer of The calculation of a student's grade is...

Question 11

Data on a customer form could be represented on a data-flow diagram as a data flow.

Accepted Answer

Data on a customer form is a type of data flow that represents the information moving from the customer form to the system or database where it is stored and processed. This information can be represented on a data-flow diagram as a data flow between the customer form and the system.

Question 12

Data-flow diagramming is one of several structured analysis techniques used to increase software development productivity.

Accepted Answer

Data-flow diagramming is indeed a structured analysis technique used in software development to increase productivity.

Question 13

On a data-flow diagram, an arrow represents an action, such as calculating an employee's pay.

Accepted Answer

On a data-flow diagram, an arrow represents the flow of data, not actions.

Question 14

A primitive level data-flow diagram is the first deliverable produced during requirements structuring.

Accepted Answer

The answer of A primitive level data-flow diagram is the...

Question 15

Data-flow diagrams evolve from the more general to the more detailed as current and replacement systems are better understood.

Accepted Answer

This statement accurately describes how data-flow diagrams are typically developed and refined over time. As the understanding of the current system and the desired replacement system becomes more clear, the diagrams become more detailed and specific in order to accurately represent the flow of data and processes involved.

Question 16

The determination of which items are low in stock is represented on a data-flow diagram as a process.

Accepted Answer

The determination of which items are low in stock is a process, and on a data-flow diagram, processes are represented as rectangles.

Question 17

Assume your local veterinarian records information about each of his patients on patient medical history forms; the collection of medical history forms is represented on a data-flow diagram as a data store.

Accepted Answer

This statement is true as the collection of medical history forms serves as a data store in the veterinarian's data-flow diagram.

Question 18

Logic modeling graphically represents the processes that capture, manipulate, store, and distribute data between a system and its environment and among components within a system.

Accepted Answer

The answer of Logic modeling graphically represents the processes that...

Question 19

A data-flow diagram (DFD) is a graphical tool that allows analysts to illustrate the flow of data in an information system.

Accepted Answer

A data-flow diagram is indeed a graphical tool used to show the flow of data in an information system.

Question 20

On a data-flow diagram, a diamond represents a process.

Accepted Answer

On a data-flow diagram, a diamond represents a decision or a branching point in the flow of data. A process is represented by a rectangle.

Quiz 6: Structuring System Requirements: Process Modeling