Deck 6: Structuring System Requirements: Process Modeling

Question 1

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

Answer 1

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.

Answer 2

True

Question 3

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

Answer 3

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.

Question 5

Sources and sinks are internal to the system.

Question 6

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

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.

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.

Question 9

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

Question 10

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

Question 11

A data flow represents data in motion, 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.

Question 13

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

Question 15

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

Question 17

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

Question 18

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

Question 19

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

Question 20

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

Question 21

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

Question 22

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

Question 23

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

Question 24

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 25

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 26

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

Question 27

A process has a verb label.

Question 28

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

Question 29

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 30

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

Question 31

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

Question 32

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

Question 33

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 34

Because the system's data stores are conceptually inside the one process, no data stores appear on a context diagram.

Question 35

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 36

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 37

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

Question 38

Data cannot move directly from a source to a sink.

Question 39

A data flow to a data store means update.

Question 40

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

Question 41

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.

Question 42

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

Question 43

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

Question 44

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 45

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 46

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 47

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 48

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 49

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 50

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 51

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 52

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

Question 53

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

Question 54

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 55

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

Question 56

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 57

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

Question 58

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 59

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 60

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

Question 61

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

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

Question 62

On a data-flow diagram, a rectangle with rounded corners represents a(n):

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

Question 63

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 64

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 65

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 66

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 67

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

A) Data must originate outside a system from one or more sources.
B) The system must produce information to one or more sinks.
C) Sources/sinks are always outside the information system and define the boundaries of the system.
D) If any processing takes place inside the source/sink, we are not interested in it.
E) All of the above are true statements.

Question 68

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 69

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 70

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 71

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 72

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 73

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.

Question 74

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

A) A customer
B) A supplier
C) Another information system
D) A bank
E) All of the above

Question 75

A square on a data-flow diagram represents a:

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

Question 76

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 77

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 78

Which of the following would be considered when diagramming?

A) The interactions occurring between sources and sinks
B) How to provide sources and sinks direct access to stored data
C) How to control or redesign a source or sink
D) What a source or sink does with information or how it operates
E) None of the above

Question 79

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 80

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.