Sad_Finals Ch7

Front 1

The data flow diagram graphically characterizes data processes and flows in a business system.

Back 1

T

Front 2

The biggest advantage of the data flow approach lies in the conceptual freedom found in the use of the four symbols.

Back 2

T

Front 3

The data flow diagram may be used to analyze the proposed system.

Back 3

T

Front 4

An arrow is used to depict an external entity that can give and receive data from the system.

Back 4

F

Front 5

Each external entity is labeled with a noun.

Back 5

T

Front 6

A rectangle with rounded corners is used to show the occurrence of a transforming process.

Back 6

T

Front 7

Processes in a rectangle with rounded corners sometimes denote something other than a change in or transformation of data or a system/subsystem.

Back 7

F

Front 8

Processes that transform data should be indicated with a noun.

Back 8

F

Front 9

In logical data flow diagrams, the type of physical storage is unspecified.

Back 9

T

Front 10

The name of the data flow coming out of a process should be different from the name of the data flow going into the process.

Back 10

T

Front 11

The top of the process symbol may be used later on in analysis when physical implementation has been chosen.

Back 11

F

Front 12

The systems analyst needs to conceptualize data flows from a top-down perspective.

Back 12

T

Front 13

The highest level data flow diagram is called Diagram 0.

Back 13

F

Front 14

With a top-down approach, the diagrams move from specific to general.

Back 14

F

Front 15

More detail is achievable through using a process called exploding the diagrams.

Back 15

T

Front 16

Data flow diagrams must be drawn working from left to right on the page.

Back 16

F

Front 17

All data flow must either originate or terminate on a process.

Back 17

T

Front 18

Data stores may be directly connected to each other by a data flow.

Back 18

F

Front 19

Linear data flow from process to process is normal in higher level data flow diagrams.

Back 19

F

Front 20

Unbalanced decomposition means that the data flow to or from a parent process does not match the data flow in or out of a child diagram.

Back 20

T

Front 21

A logical data flow diagram shows how the business operates.

Back 21

T

Front 22

A physical data flow diagram shows how the system will be implemented.

Back 22

T

Front 23

Transaction files are used to link all logical data flow diagram processes.

Back 23

F

Front 24

Partitioning is used to create a set of computer programs and manual procedures from a data flow diagram.

Back 24

T

Front 25

A CRUD matrix is a tool used to represent where master files are read, updated, created, and deleted within the system.

Back 25

T

Front 26

A use case summarizes an event and defines one activity.

Back 26

T

Front 27

Partitioning may be used to show which Web pages are placed on a secure server and which are on a non-secure server.

Back 27

T

Front 28

Each time data must be obtained from a data store or an external partner, there should be a unique Web form and process to validate the data.

Back 28

T

Front 29

Having separate Web forms means that the forms will become more complex.

Back 29

F

Front 30

Which of the following graphically characterize(s) processes and data flows through a business system?
A. Data dictionary
B. Data flow diagrams
C. Structured analysis
D. Design

Back 30

B. Data flow diagrams

Front 31

Which of the following is the biggest advantage of the data flow approach over narrative explanations?
A. Freedom from committing to the technical implementation of the system too early
B. Further understanding of the interrelatedness of systems and subsystems
C. Communicating current system knowledge of users through data flow diagrams
D. Conceptual freedom found in the use of the four symbols

Back 31

D. Conceptual freedom found in the use of the four symbols

Front 32

Which of the following is not one of the four basic symbols used to chart data movement on data flow diagrams?
A. Oval
B. Arrow
C. Rectangle with rounded corners
D. Open-ended rectangle

Back 32

A. Oval

Front 33

What is the middle of the process symbol used for?
A. Process sequence
B. Identifying number
C. Process description
D. Process implementation

Back 33

C. Process description

Front 34

Which of the following describes an error condition?
A. External entities directly connected to other external entities
B. External entities connected to processes
C. Data stores connected to processes
D. Several data flow entering or leaving a process

Back 34

A. External entities directly connected to other external entities

Front 35

Which of the following is not included in the context level diagram?
A. Basic inputs
B. Processes
C. Data store
D. Outputs

Back 35

C. Data store

Front 36

A primitive process is:
A. a process that is not exploded to a child diagram.
B. the central process on a context level diagram.
C. a process that requires two or more data flow into it.
D. a process that has only base elements flowing in or out of it.

Back 36

A. a process that is not exploded to a child diagram.

Front 37

Which of the following is not an error when drawing a data flow diagram?
A. all data flowing into a process or out of a process
B. data flow on a child diagram that has only one end connected to a process, the other end is a point in space
C. connecting data stores and external entities directly to each other
D. placing more than nine processes on a data flow diagram

Back 37

B. data flow on a child diagram that has only one end connected to a process, the other end is a point in space

Front 38

When the data flow in and out of a parent process do not match the data flow in or out of a child diagram, it is called:
A. a primitive process.
B. a disordered pair.
C. a logical data flow diagram.
D. unbalanced decomposition.

Back 38

D. unbalanced decomposition.

Front 39

A logical data flow diagram:
A. includes types of programs, such as online or batch.
B. is a model of how the system will be implemented.
C. does not include any primitive processes.
D. is a model of how the business works.

Back 39

D. is a model of how the business works.

Front 40

Which of the following is not an advantage of using a logical model?
A. A system based on a logical model is more stable.
B. The logical model helps the analyst understand the business being studied.
C. It facilitates communication with the users.
D. A logical model clarifies which processes are automated.

Back 40

D. A logical model clarifies which processes are automated.

Front 41

Which of the following is not an advantage of using a physical model?
A. Transaction data stores are identified.
B. It is easier to create compared with the logical model.
C. The sequence of processes is identified.
D. Controls are included.

Back 41

B. It is easier to create compared with the logical model.

Front 42

Physical data flow diagrams:
A. include processes for adding, updating, changing, and deleting records.
B. are used to model business events, along with their input and output.
C. enable the analyst to better understand the business.
D. include no interface data flow in or out of processes.

Back 42

A. include processes for adding, updating, changing, and deleting records.

Front 43

Transaction files:
A. are used when interface data flow exist on data flow diagrams.
B. may be used to link processes that execute at different times.
C. are included to store all derived elements.
D. are required to implement all on-line processes.

Back 43

B. may be used to link processes that execute at different times.

Front 44

Which of the following is not a reason for partitioning processes into separate programs?
A. The processes represent different user groups.
B. The processes execute at different times.
C. To control system security.
D. To maintain consistency of data.

Back 44

D. To maintain consistency of data.

Front 45

A CRUD matrix is used to show:
A. places in the system where the data is inaccurate.
B. where records are updated, added, deleted, or used.
C. which Web pages are placed on a secure server.
D. the partitioning of data flow diagrams in a client/server environment.

Back 45

B. where records are updated, added, deleted, or used.

Front 46

In a CRUD matrix, each row represents the data stores used for each:
A. process.
B. database table.
C. data flow child diagram.
D. activity.

Back 46

D. activity.

Front 47

The process of creating a simple data flow diagram fragment for each unique system trigger is called:
A. event modeling.
B. trigger analysis.
C. response cases.
D. CRUD model analysis.

Back 47

A. event modeling.

Front 48

The advantage of building data flow diagrams based on events is that:
A. events are small scale and easy to analyze for input and output.
B. users are familiar with the events within their business and know how the events drive other activities.
C. events fall into one of four categories: read, update, create, delete.
D. events are predictable and lend a high degree of stability to the data flow diagram.

Back 48

B. users are familiar with the events within their business and know how the events drive other activities.

Front 49

A use case:
A. summarizes an activity, its trigger, input, and output.
B. describes a subsystem of a data flow diagram showing how the processes use data produced by other processes.
C. describes how the data is partitioned into programs for different users.
D. shows when the data is updated, read, created or deleted.

Back 49

A. summarizes an activity, its trigger, input, and output.

Front 50

Partitioning on a data flow diagram for an ecommerce Web site may be used to show:
A. external events.
B. triggers.
C. security.
D. derived elements.

Back 50

C. security.

Front 51

Which of the following is a goal of dividing a Web site into a series of Web
pages?
A. Improve the ease of maintaining the Web site.
B. Improve the collection of Web metrics.
C. Improve tracking of page movement by the customer.
D. Improve the revenue obtained by page marketing.

Back 51

A. Improve the ease of maintaining the Web site.

Front 52

What should be created each time data must be obtained from a data store or
an external partner?
A. A transaction data store
B. A new browser window and DFD process to validate the window’s data
C. A unique Web form and DFD process to validate and process the data
D. A Web form that extends the previous Web form.

Back 52

C. A unique Web form and DFD process to validate and process the data

Front 53

Having separate Web forms to collect transaction data means that:
A. the forms are each quite complex with complex validation.
B. the forms are less complex and easier to fill out.
C. the processing will take place slowly.
D. the Web site will not be as attractive.

Back 53

B. the forms are less complex and easier to fill out.

Front 54

Each time an external company or system is involved:
A. the processes that handle each of the interactions should be partitioned into one program for security reasons.
B. a new temporary data store must be used with a process to create the data store.
C. the process that handles the interaction must be on a secure server.
D. the process involved needs to be partitioned into a separate program.

Back 54

D. the process involved needs to be partitioned into a separate program.

Front 55

A method that provides conceptional freedom for representing processes and flows in a business system is the___________.

Back 55

Data flow diagram

Front 56

_________ depict the broadest possible overview of system inputs, processes, and outputs.

Back 56

Data flow diagrams

Front 57

By using combinations of only four symbols, the systems analyst is able to create a pictorial depiction of data flows that eventually can provide solid system ___________.

Back 57

Documentation

Front 58

The data flow approach enables the systems analyst to better understand the interrelatedness of the _______ and its_______.

Back 58

System, subsystems

Front 59

An external entity is called a source or _______ of data, and is considered to be external to the study.

Back 59

Destination

Front 60

Data flows occurring simultaneously can be depicted doing just that through the use of _______ arrows.

Back 60

Parallel

Front 61

The data store symbol is simply showing a depository for data that allows addition or _______ of data.

Back 61

Retrieval

Front 62

With a(n) ______ approach, the diagrams move from general to specific.

Back 62

Top-Down

Front 63

Although the first diagram helps the systems analyst grasp basic data ________, its general nature limits its usefulness.

Back 63

Movement

Front 64

When the first diagram is made, _________ and _________ are specified and these remain constant throughout all of the following diagrams.

Back 64

Inputs, Outputs

Front 65

Effective _________ is required for a person unfamiliar with the system to understand the data flow diagram.

Back 65

Naming

Front 66

A(n) _________ is one that does not explode to a child diagram.

Back 66

Primitive Process

Front 67

When a process has all input or all output data flow, it means that a(n) _________ is pointing in the wrong direction or there is a missing _______.

Back 67

Arrowhead, Data Flow

Front 68

___________ is when the data flow in or out of a child diagram does not match the data flow in or out of a parent process.

Back 68

Unbalanced decomposition

Front 69

A(n) _______ data flow diagram focuses on how the business operates.

Back 69

Logical

Front 70

A(n) _______ data flow diagram shows how the system will be implemented.

Back 70

Physical

Front 71

A(n) __________ links two processes that execute at different times.

Back 71

Transaction File

Front 72

_________ are keyed into the system.

Back 72

Base elements

Front 73

_________ are created by a process using a formula or some logic.

Back 73

Derived elements

Front 74

__________ data flow diagrams is the process of deciding which processes are manual procedures and which processes should be grouped into which computer programs.

Back 74

Partitioning

Front 75

_____________ on data flow diagrams is a top priority.

Back 75

Effective naming

Front 76

A(n) _______ matrix shows where records are added, changed, used, and deleted from a file.

Back 76

CRUD

Front 77

A __________ summarizes an event and defines one activity, its trigger, input, and output.

Back 77

Use case

Front 78

Each time an external company or system is involved in the activities of a Web site, the process that handles them must be partitioned into a(n) __________.

Back 78

Separate program