Deck 7: Structuring System Process Requirements

Question 1

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

Answer 1

True

Question 2

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

Answer 2

True

Question 3

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.

Answer 3

False

Question 4

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

Question 5

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

Question 6

On a data flow diagram,a paycheck is represented as a data store.

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Question 12

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 13

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

Question 14

Assume shipment data is 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 15

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

Question 16

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

Question 17

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

Question 18

On a data flow diagram in the DeMarco and Yourdon model,two parallel lines represent a data store.

Question 19

A customer order is represented on a data flow diagram as a data flow.

Question 20

Sources and sinks are internal to the system.

Question 21

A process has a verb phrase label.

Question 22

A data flow to a data store means update.

Question 23

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

Question 24

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 25

Because data flow names represent 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

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

Question 27

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 28

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

Question 29

Functional decomposition is an iterative process of breaking the description of a system down into finer and finer detail.

Question 30

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 31

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

Question 32

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 33

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 34

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

Question 35

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

Question 36

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 37

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

Question 38

Data cannot move directly from a source to a sink.

Question 39

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

Question 40

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

Question 41

Assume condition one has three values,condition two has four values,and condition three has two values; the number of rules required for the decision table is nine.

Question 42

Referencing a decision table,specific combinations of conditions trigger specific actions.

Question 43

The principle of balancing and the goal of keeping a DFD as simple as possible led to four additional,advanced rules for drawing DFDs.

Question 44

Inefficiencies cannot be identified by studying DFDs.

Question 45

Decision tables allow you to represent a set of conditions and the actions that follow from them in a tabular format.

Question 46

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

Question 47

Data flow diagrams aren't versatile enough to be used as tools for process modeling.

Question 48

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

Question 49

A decision table is a matrix representation of the logic of a decision,which specifies the possible conditions for the decision and the resulting actions.

Question 50

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

Question 51

Action stubs are that part of a decision table that lists the conditions relevant to the decision.

Question 52

Condition stubs are that part of a decision table that lists the actions that result for a given set of conditions.

Question 53

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

Question 54

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

Question 55

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

Question 56

Assume condition one has two values,condition two has five values,condition three has three values,and condition four has two values; the number of rules required for the decision table is sixty.

Question 57

Make the decision table as simple as possible by removing any rules with impossible actions.

Question 58

An insignificant condition is a condition in a decision table whose value does not affect which actions are taken for two or more rules.

Question 59

Rules are that part of the decision table that specify which actions are to be followed for a given set of conditions.

Question 60

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 61

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

A)context diagram
B)level-2 diagram
C)referencing diagram
D)representative diagram

Question 62

In a decision table,an indifferent condition is represented by an asterisk.

Question 63

Referencing a decision table,a limited entry occurs when a condition has only two possible values.

Question 64

Decision tables support nested conditions.

Question 65

The deliverables of process modeling state:

A)how you should develop the system during physical design
B)what you learned during requirements determination
C)how you should implement the new system during implementation
D)what you learned during project planning

Question 66

Data flow diagrams that concentrate on the movement of data between processes are referred to as:

A)process models
B)data models
C)flow models
D)flow charts

Question 67

A file folder containing orders is represented on a data flow diagram as a:

A)process
B)source
C)data flow
D)data store

Question 68

Data at rest,which may take the form of many different physical representations,defines:

A)source
B)data store
C)data flow
D)process

Question 69

A computer-based file containing employee information is represented on a data flow diagram as a:

A)data flow
B)source
C)data store
D)process

Question 70

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

A)data store
B)process
C)source
D)data flow

Question 71

Calculating an employee's salary is represented on a data flow diagram as a:

A)data flow
B)source
C)data store
D)process

Question 72

If an inventory item is either perishable or nonperishable,its condition is classified as an extended entry.

Question 73

Graphically representing the functions,or processes,which capture,manipulate,store,and distribute data between a system and its environment and between components within a system refers to:

A)data modeling
B)flow charting
C)process modeling
D)transition modeling

Question 74

Which of the following is not one of the four types of data flow diagrams?

A)current physical
B)current logical
C)updated physical
D)new physical

Question 75

Referencing a decision table,every possible combination of conditions must be represented.

Question 76

Which of the following is not one of the primary deliverables resulting from studying and documenting a system's processes?

A)context data flow diagram (DFD)
B)thorough descriptions of each DFD component
C)DFDs of the current logical system
D)state-transition diagram

Question 77

Referencing a decision table,an action is provided for each rule.

Question 78

Referencing a decision table,an employee condition that has only two possible values is considered a limited entry.

Question 79

If the different values for the employee type condition do not affect the action taken,then employee type is an indifferent condition.

Question 80

Student data contained on an enrollment form is represented on a data flow diagram as a:

A)process
B)data flow
C)source
D)data store