Question 1

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

Accepted Answer

True

Question 2

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

Accepted Answer

This statement is true. A data-flow diagram (DFD) is a graphical tool that is commonly used by analysts and designers to illustrate the flow of data in an information system. A DFD is typically used to model the inputs, outputs, processes, and storage of data in a system, and can be used to identify potential areas of improvement or inefficiency.

Question 3

Data-flow diagrams illustrate important concepts about data and their relationships.

Accepted Answer

False

Question 4

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 like data-flow diagramming can assist in ensuring compatibility and correct specifications when implementing a new system.

Question 5

Sources and sinks are internal to the system.

Accepted Answer

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

Question 6

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

Accepted Answer

On a data-flow diagram, a diamond represents a decision or a data transformation. A process is represented by a rectangle.

Question 7

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

The statement correctly describes the use of a data-store on a data-flow diagram.

Question 8

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

The answer of Assume shipment data are entered into a...

Question 9

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

Accepted Answer

The answer of On a data-flow diagram, an arrow represents...

Question 10

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

Accepted Answer

The process of determining which items are low in stock is a step in the inventory management system and can be represented as a process in a data-flow diagram.

Question 11

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

Accepted Answer

A data flow is a representation of data moving from one place in the system to another.

Question 12

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

Accepted Answer

The answer of On a data-flow diagram, a check and...

Question 13

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 typically represented as a source or sink on a data-flow diagram.

Question 14

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 15

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 to improve software development productivity.

Question 16

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 17

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

Accepted Answer

The answer of When constructing data-flow diagrams, you should show...

Question 18

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

Accepted Answer

This is true because data-flow diagrams start with a high-level overview and then add more detail as the system is analyzed and understood. This allows for a more comprehensive understanding of the system and its processes.

Question 19

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 20

A course schedule request would be represented on a data-flow diagram as a data-flow.

Accepted Answer

A course schedule request is a type of data that flows through the system, therefore it can be represented as a data-flow on a data-flow diagram.

Quiz 6: Structuring System Requirements: Process Modeling