Deck 6: Structuring System Requirements: Process Modeling

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.

Answer 1

False

Question 2

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

Answer 2

False

Question 3

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

Answer 3

True

Question 4

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

Question 5

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

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.

Question 7

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

Question 8

Sources and sinks are internal to the system.

Question 9

A Web site's customer is represented as a source 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.

Question 11

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

Question 12

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

Question 13

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

Question 14

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

Question 15

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

Question 16

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

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.

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.

Question 19

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

Question 20

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

Question 21

Context diagrams have only one process labeled "P-1."

Question 22

Assume Process 7.4 produces a data flow and that Process 7.2 must be ready to accept it; we would say that these processes are physically linked to each other.

Question 23

Data cannot move directly from a source to a sink.

Question 24

No data stores appear on a context diagram.

Question 25

Because a data flow name represents a specific set of data, another data flow that has even one more or one less piece of data must be given a different, unique name.

Question 26

A data flow can go directly back to the same process it leaves.

Question 27

Double-ended arrows are used to represent data flowing in both directions.

Question 28

The lowest-level data-flow diagrams are called level-0 diagrams.

Question 29

The decomposition of Process 1.1 would be shown on a level-1 diagram.

Question 30

Functional decomposition is a repetitive process of breaking the description or perspective of a system down into finer and finer detail.

Question 31

A fork in a data flow means that exactly the same data go from a common location to two or more different processes, data stores, or sources/sinks.

Question 32

A context diagram shows the scope of the organizational system, system boundaries, external entities that interact with the system, and the major information flows between entities and the system.

Question 33

More than one data flow noun phrase can appear on a single arrow as long as all of the flows on the same arrow move together as one package.

Question 34

A data flow to a data store means update.

Question 35

To keep a data-flow diagram uncluttered, you may repeat data stores, sinks/sources, and processes.

Question 36

A level-0 diagram is a data-flow diagram that represents a system's major processes, data flows, and data stores at a high level of detail.

Question 37

Assume we have placed a data store between Process 5.1 and Process 5.5; we would say that these processes are decoupled.

Question 38

The decomposition of Process 2.4.3.4 would be shown on a level-4 diagram.

Question 39

On a data-flow diagram, a rectangle with the right vertical line missing represents a data store.

Question 40

A process has a verb label.

Question 41

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

Question 42

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.

Question 43

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.

Question 44

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.

Question 45

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.

Question 46

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

Question 47

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.

Question 48

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

Question 49

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.

Question 50

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.

Question 51

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

Question 52

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.

Question 53

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

Question 54

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

Question 55

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.

Question 56

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

Question 57

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

Question 58

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.

Question 59

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.

Question 60

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

Question 61

A miracle process is one that:

A) has only inputs.
B) has only outputs.
C) cannot be exploded further.
D) has insufficient inputs to produce the associated processes.
E) is connected directly to a source.

Question 62

Which of the following is most likely a source/sink for a manufacturing system?

A) A report
B) A file
C) Payment record
D) A bank deposit
E) A bank

Question 63

The calculation of an employee's salary would be represented on a data-flow diagram as a(n):

A) data flow.
B) source.
C) data store.
D) process.
E) action stub.

Question 64

By placing a data store between two processes, this:

A) decouples the processes.
B) enables store and forward capabilities.
C) enhances the flow of data between the processes.
D) structures the processes.
E) disintegrates the processes.

Question 65

On a data-flow diagram, a rectangle with the right vertical line missing represents a:

A) data store.
B) data flow.
C) process.
D) source.
E) relationship.

Question 66

If two processes are connected by a data flow, they are said to:

A) exhibit cohesion.
B) share the same data.
C) be coupled to each other.
D) be strapped to each other.
E) be intertwined.

Question 67

Which of the following is a True statement regarding a data store?

A) Data can move directly from one data store to another data store.
B) Data stores illustrate relationships among entities.
C) A data store has a noun-phrase label.
D) Data can move from an outside source to a data store.
E) A data store shows data in motion.

Question 68

A supplier of auto parts to your company would be represented on a data-flow diagram as a:

A) process.
B) source.
C) data flow.
D) data store.
E) relationship.

Question 69

Recording a customer's payment would be represented on a data-flow diagram as a(n):

A) process.
B) source.
C) data flow.
D) data store.
E) action stub.

Question 70

Which of the following is True regarding the context diagram?

A) The process symbol is labeled "0."
B) The context diagram contains two processes.
C) Data stores must be shown on the context diagram.
D) The internal workings of the system are shown on the context diagram.
E) The context diagram organizes the processes in a tree-like structure.

Question 71

A square on a data-flow diagram represents a sink or a:

A) data flow.
B) data store.
C) process.
D) predecessor.
E) source.

Question 72

The work or actions performed on data so that they are transformed, stored, or distributed defines:

A) source.
B) data store.
C) data flow.
D) process.
E) action stub.

Question 73

A data-flow diagram that represents a system's major processes, data flows, and data stores at a high level of detail refers to a:

A) context diagram.
B) level-1 diagram.
C) level-0 diagram.
D) level-00 diagram.
E) logic diagram.

Question 74

A computer-based file containing employee information would be represented on a data-flow diagram as a(n):

A) data flow.
B) source.
C) data store.
D) process.
E) action stub.

Question 75

On a data-flow diagram, a rectangle represents a source or a(n):

A) data store.
B) process.
C) action stub.
D) data flow.
E) sink.

Question 76

The origin and/or destination of data, sometimes referred to as external entities defines:

A) source.
B) data store.
C) data flow.
D) process.
E) predecessor.

Question 77

The shape of a data-flow (DFD) diagramming process is a(n):

A) arrow.
B) square.
C) rectangle.
D) rounded rectangle.
E) open box.

Question 78

Which of the following is a True statement regarding sources/sinks?

A) Data must originate inside a system from one or more sources.
B) The system must produce information to only one sink.
C) Sources/sinks are always outside the information system.
D) If any processing takes place inside the source/sink, we are very interested in it.
E) Sinks and sources are used interchangeably.

Question 79

An arrow on a data-flow diagram represents a(n):

A) data store.
B) data flow.
C) process.
D) source.
E) action sequence.

Question 80

A black hole is a process that:

A) has only inputs.
B) has only outputs.
C) has not been exploded to show enough detail.
D) has insufficient inputs to produce the associated processes.
E) generates output directly to a sink.