CH5 (test bank)

Question 1

T/F: An actor is always outside of the automation boundary.

Answer 1

T

Question 2

Two difference scenarios of a use case would normally be described in a single fully developed use case description.

Answer 2

F, only one scenario of a use case is described in a fullt developed use case.

Question 3

T/F: A good way to describe a use case scenario is with a state chart.

Answer 3

F, State Machine Diagram

Question 4

T/F: Activity diagrams are not helpful when the flow of activities is too complex.

Answer 4

F

Question 5

T/F: An activity diagram and the flow of activities in a fully developed use case description serve the same purpose.

Answer 5

T

Question 6

T/F: Since an activity diagram is not object-oriented (e.g. no objects), it is not a standard model of the object-oriented Unified Modeling Language (UML).

Answer 6

F, it is.

Question 7

T/F: In a system sequence diagram the order of the messages is determined by numbering the messages.

Answer 7

F

Question 8

T/F: In a system sequence diagram a box refers to a class of objects.

Answer 8

F

Question 9

T/F: A true/false condition on a sequence diagram indicates whether the message can be processed or not.

Answer 9

F

Question 10

T/F: A loop frame and an asterisk mean the same thing in a sequence diagram.

Answer 10

T

Question 11

T/F: On a sequence diagram, a message represents a service request.

Answer 11

T

Question 12

T/F: An Opt frame and an Alt frame do essentially the same thing.

Answer 12

F

Question 13

T/F: An Opt frame and a true/false condition on a message serve essentially the same purpose

Answer 13

T

Question 14

T/F: Activity diagrams are not helpful in developing system sequence diagrams (SSDs).

Answer 14

F, it is helpful in developing system sequence diagrams

Question 15

T/F: In the object-oriented approach to systems development, the flow of information is achieved by sending messages either to and from actors or back and forth between internal objects.

Answer 15

T

Question 16

T/F: In a sequence diagram, a message is considered to be an action that is invoked on the destination object.

Answer 16

T

Question 17

T/F: Activity diagrams cannot be used to describe processes that involve automated system activities.

Answer 17

F, it can.

Question 18

T/F: In an activity diagram, a separate use case may used as part of the workflow.

Answer 18

T

Question 19

Another way to think of a actor using a use case is as a(n) _______.

Answer 19

role

Question 20

A unique set of internal activities within a use case which represents a unique path through the use case is called a(n) _______.

Answer 20

scenario

Question 21

In a fully developed use case description the postcondition data describes what conditions?
a. The status condition of the use case.
c. The condition of the actor.
b. The existence of domain model objects.
d. The data that is output by the system.

Answer 21

b. The existence of domain model objects.

Question 22

In a fully developed use case description the exception conditions represent what?
a. What conditions might cause the system to crash.
b. What conditions prevent the system from successfully completing the use case.
c. What conditions will confuse the actor.
d. Where the system might have “bugs” and produce erroneous results.

Answer 22

b. What conditions prevent the system from successfully completing the use case.

Question 23

In a fully developed use case description, the flow of activities is most similar to what?
a. An activity diagram
c. A state chart diagram
b. A class diagram d. A system sequence diagram

Answer 23

a. An activity diagram

Question 24

Numbering exception conditions, which often uses hierarchical numbering, in a fully developed use case description is helpful to _______.
a. tie exception conditions to other diagrams or descriptions
b. show which exception conditions are subordinate to other exceptions
c. provide an identifier for each exception condition
d. tie the exception condition to a processing step

Answer 24

d. tie the exception condition to a processing step

Question 25

In a fully developed use case description normally the preconditions describe what?
a. What objects must exist prior to the use case executes.
b. What data the actor must have before the use case executes.
c. Who the actors are that invoke the use case.
d. What business conditions must occur before the use case is invoked.

Answer 25

a. What objects must exist prior to the use case executes.

Question 26

Which of the following is the best model to use to document the inputs and the outputs to a system?
a. State chart diagram
c. Activity diagram
b. Fully developed use case description d. System sequence diagram

Answer 26

d. System sequence diagram

Question 27

A vehicle object is denoted with the following label.
a. vehicle
c. Vehicle
b. Vehicle
d. :Vehicle (underlined)

Answer 27

d. :Vehicle (underlined)

Question 28

In UML terminology in a sequence diagram, a message refers to a(n) _______.
a. input data
c. event
b. communication between actors
d. action

Answer 28

d. action

Question 29

In a sequence diagram a horizontal dashed line represents what?
a. A return message
c. A lifeline
b. An input message
d. An event

Answer 29

a. A return message

Question 30

In a sequence diagram the syntax of a message is given by the following:
[A] B := C (D) The letter B represents what?

Answer 30

b. return value

Question 31

In a sequence diagram the message-name is usually given in what format?
a. verb-noun
c. action-object
b. noun-verb
d. object-action

Answer 31

a. verb-noun

Question 32

If the True/False condition on a message evaluates to false in a sequence diagram, which of the following is correct?
a. The message is false.
c. The message is not processed.
b. The message has no return value. d. The message is not sent.

Answer 32

d. The message is not sent.

Question 33

Which of the following documents information about classes that are part of the problem domain of the user?
a. Activity diagram c. Use case diagram
b. State machine diagram
d. System sequence diagram

Answer 33

b. State machine diagram

Question 34

For real-world objects the state of an object is the same as its _______ .
a. lifeline
c. attribute values
b. status condition d. persistence

Answer 34

b. status condition

Question 35

In a transition label in a state machine the syntax is A(B)[C]/D. The D stands for what?
a. transition name c. action expression
b. true/false condition
d. input parameters

Answer 35

c. action expression

Question 35

For real-world objects the state of an object is the same as its _______ .
a. lifeline
c. attribute values
b. status condition d. persistence

Answer 35

b. status condition

Question 36

The guard-condition on a transition indicates what?
a. Whether the transition fires.
c. Whether the object is in the correct state.
b. Whether the action-expression executes.
d. Whether the trigger message is received.

Answer 36

a. Whether the transition fires.

Question 37

An action-expression occurs when?
a. Before the object leaves the origin state.
b. After the object enters the destination state.
c. Before the object enters the destination state.
d. Before the transition fires.

Answer 37

c. Before the object enters the destination state.

Question 38

On a systems sequence diagram, ____ indicate(s) a true/false condition.
a. ( ) c. { }
b. [ ] d. *

Answer 38

b. [ ]

Question 39

In a state machine diagram, a state is represented by a(n) ____.
a. oval
c. square
b. black dot
d. arrow

Answer 39

a. oval

Question 40

To document ____, draw a composite state with the lower portion divided into multiple compartments for each concurrent path of behavior.
a. simple nested states
c. concurrent behavior of different objects
b. concurrent behavior of a single object
d. simple paths

Answer 40

b. concurrent behavior of a single object

Question 41

Which of the following is NOT an element in a transition label?
a. trigger
c. guard condition
b. transition name d. action expression

Answer 41

a. trigger

Question 42

A message event causes what to happen?
a. An activity to finish.
c. A guard condition to be evaluated.
b. A message to fire.
d. A transition to fire.

Answer 42

d. A transition to fire.

Question 43

Which of the following is NOT a step in the development of a state machine diagram?
a. List all the status conditions for an object.
b. Identify state exiting transitions.
c. Expand the name of each state to identify concurrent activities.
d. Sequence the state-transition fragments.

Answer 43

c. Expand the name of each state to identify

Question 44

A state machine diagram is used to document the states and transitions of a(n) ________.

Answer 44

Object

Question 45

The ____ are the primary models from which other models draw information.
a. statechart diagram and the problem domain class diagram.
b. system sequence diagram and the activity diagram
c. use case diagram and the problem domain class diagram
d. use case description and the use case diagram

Answer 45

c. use case diagram and the problem domain class diagram

Question 46

Which of the following is NOT an advantage of object-oriented modeling with several models is that _____.
a. developing new models allows the analyst to discard unnecessary diagrams.
b. developing new models ensures a consistency in the requirements.
c. developing new models helps correct previously drawn diagrams
d. developing new models helps gain deeper understanding of user requirements.

Answer 46

a. developing new models allows the analyst to discard unnecessary diagrams.

Question 47

Two methods to show a repeating message are: (Choose two)
a. Dashed arrow d. Opt frame
b. Brackets [ ]
e. Loop frame
c. Asterisk *
f. Alt frame

Answer 47

e. Loop frame
c. Asterisk *

Question 48

Two methods to show a return value are: (Choose two)
a. value :=
d. := value
b. [ value ]
e. Solid arrow with value
c. ( value )
f. Dashed arrow with value

Answer 48

f. Dashed arrow with value
a. value :=

Question 48

A textual model that describes the processing details of a use case is called a(n) ________.

Answer 48

use case description

Question 49

Use cases may have different “paths” or sequence of steps through the use case. These different paths are called _______ .

Answer 49

scenarios

Question 50

A certain set of values or statuses that must exist before a use case begins is called a(n) _______.

Answer 50

precondition

Question 51

A certain set of values or statuses that must exist after a use case completes its processing is called a(n) _______.

Answer 51

postcondition

Question 52

The diagram model that is useful to document the flow of activities on a fully developed use case description is called a(n) _______ diagram.

Answer 52

activity

Question 53

A diagram that shows the messages between an actor and the system is called a(n) _______.

Answer 53

system sequence diagram

Question 54

Vertical dashed lines on a system sequence diagram are used to depict a(n) _________.

Answer 54

lifeline

Question 55

An arrow on a system sequence diagram is used to depict a(n) what?

Answer 55

message

Question 56

A box in a system sequence diagram refers to a(n) what?

Answer 56

object

Question 57

On a sequence diagram when multiple messages are included within a repeating loop a(n) _______ is used to document it.

Answer 57

loop frame

Question 58

On a sequence diagram a short notation that indicates a repeating message is a(n) _______.

Answer 58

asterisk

Question 59

In a sequence diagram the syntax of a message is given by the following:
[A] B := C (D) The letter D represents what?

Answer 59

parameters

Question 60

To show if-then-else condition on a sequence diagram use a(n) ______.

Answer 60

alt frame

Question 61

A condition during an object’s life when it satisfies some criterion is called a(n) _______.

Answer 61

state

Question 62

A condition during an object’s life when it satisfies some criterion is called a(n) _______.

Answer 62

transition

Question 63

A UML diagram that shows the life of an object in states and transitions is called a(n) _______.

Answer 63

state machine diagram

Question 64

When an object moves from one state to another the ending state is called a(n) _______ .

Answer 64

destination state

Question 65

The beginning state of an object when its states are diagrammed is called a(n) _______.

Answer 65

pseudostate

Question 66

In a state-machine diagram when an object is in multiple states at the same time it is called _______.

Answer 66

concurrency

Question 67

In a state-machine diagram when one state is high-level in that it contains other states of an object, it is called a(n) ______.

Answer 67

composite state

Question 68

Briefly describe the purpose of a system sequence diagram.

Answer 68

A system sequence diagram (SSD) is used to describe the flow of information into and out of the automated system. Thus, an SSD documents the inputs and the outputs and identifies the interaction between actors and the system.

Question 69

List three types of frame notation in sequence diagrams.

Answer 69

Loop frame
Opt frame
Alt frame