Deck 6: Object Modeling

Question 1

In a state transition diagram, the circle at the right with a hollow border is the initial state.

Answer 1

False - final

Question 2

A(n) _____ represents a person, a place, an event, or a transaction that is significant to the information system.

A) object
B) instance
C) class
D) model

Answer 2

A

Question 3

A method is like a blueprint, or template, for all the objects within a class.

Answer 3

False - class

Question 4

In a state transition diagram, the states appear as rounded rectangles with the state names inside.

Question 5

A car performs a(n) _____ called OPERATE WIPERS when it is sent a message with the wiper control.

A) method
B) role
C) command
D) objective

Question 6

_____ is a widely used method of visualizing and documenting an information system.

A) Unified Modeling Language (UML)
B) Java Virtual Machine (JVM)
C) UNiplexed Information and Computing System (UNIX)
D) Multimedia Logic (ML)

Question 7

Some objects might have a few attributes; others might have dozens.

Question 8

A black box does not want or need outside interference.

Question 9

When use cases are identified, all the related transactions should be kept separate.

Question 10

Just as objects are similar to adjectives, attributes resemble verbs that describe what and how an object does something.

Question 11

A(n) _____ is a specific member of a class.

A) key
B) index
C) file
D) instance

Question 12

Use cases cannot interact with other use cases.

Question 13

Class diagrams evolve into code modules, data objects, and other system components.

Question 14

By limiting access to internal processes, an object prevents its internal code from being altered by another object or process.

Question 15

An object's _____ are the tasks or functions that the object performs when it receives a command to do so.

A) roles
B) utilities
C) instances
D) methods

Question 16

After one identifies a system's objects, classes, and relationships, one should develop a(n) object relationship diagram that provides an overview of the system.

Question 17

An object has certain _____, which are characteristics that describe the object, such as the make, model, and color of a car.

A) keys
B) attributes
C) indices
D) elements

Question 18

A class diagram resembles a horizontal flowchart that shows the actions and events as they occur.

Question 19

The same message to two different objects produces the same results.

Question 20

A(n) _____ is a group of similar objects.

A) aggregate
B) concatenation
C) class
D) packet

Question 21

The _____ of an object is an adjective that describes the object's current status.

A) polymorphism
B) encapsulation
C) resemblance
D) state

Question 22

_____ describe what objects need to know about each other, how objects respond to changes in other objects, and the effects of membership in classes, superclasses, and subclasses.

A) Instances
B) Relationships
C) Aggregates
D) Clusters

Question 23

The number of _____ needed to describe the characteristics of an object depends on the business requirements of the information system and its users.​

A) attributes
B) packets
C) indices
D) keys

Question 24

An object can be viewed as a(n) _____, because a message to the object triggers changes within the object without specifying how the changes must be carried out.

A) black box
B) class diagram
C) use case
D) activity diagram

Question 25

All objects within a(n) _____ share common attributes and methods.

A) catalog
B) register
C) index
D) class

Question 26

A _____ is a command that tells an object to perform a certain method.

A) dictum
B) message
C) pledge
D) pronouncement

Question 27

The Unified Modeling Language (UML) represents an object as a _____ with the object name at the top, followed by the object's attributes and methods.

A) circle
B) rectangle
C) pentagon
D) rhombus

Question 28

An _____ shows the objects and how they interact to perform business functions and transactions.

A) object relationship diagram
B) object precedent chart
C) object antecedent chart
D) object interaction diagram

Question 29

_____ allows objects to be used as modular components anywhere in a system.

A) Dynamic addressing
B) Technical feasibility
C) Encapsulation
D) Linear addressing

Question 30

A red Mustang is a(n) _____ of the CAR class.

A) index
B) key
C) metric
D) instance

Question 31

A major advantage of object-oriented (O-O) designs is that systems analysts can save time and avoid errors by using _____ objects.

A) dynamic
B) feasible
C) modular
D) linear

Question 32

The concept that a message gives different meanings to different objects is called _____.

A) encapsulation
B) dynamic addressing
C) polymorphism
D) linear addressing

Question 33

An object, such as a bank account, can have a specific attribute called a(n) _____ that can be active, inactive, closed, or frozen.

A) state
B) grade
C) instance
D) status

Question 34

In an object-oriented system, objects can _____ certain attributes from other objects.

A) broadcast
B) concatenate
C) inherit
D) reformat

Question 35

Objects within a class can be grouped into _____, which are more specific categories within a class.

A) grids
B) units
C) subclasses
D) matrices

Question 36

Inheritance enables an object, called a _____, to derive one or more of its attributes from a parent.

A) child
B) user
C) package
D) suite

Question 37

The black box concept is an example of _____, which means that all data and methods are self-contained.

A) polymorphism
B) inheritance
C) encapsulation
D) use case modeling

Question 38

_____ enable objects to communicate and interact as they perform business functions and transactions required by a system.

A) Aggregates
B) Relationships
C) Clusters
D) Linkages

Question 39

A class can belong to a more general category called a _____.

A) superclass
B) register
C) subclass
D) catalog

Question 40

A(n) _____ resembles a verb and defines specific tasks that an object can perform.

A) attribute
B) method
C) command
D) message

Question 41

A(n) _____ resembles a horizontal flowchart that shows the actions and events as they occur.

A) state transition diagram
B) sequence diagram
C) business model diagram
D) activity diagram

Question 42

The Unified Modeling Language (UML) notation _____ identifies a zero or many relation.

A) ​0..1
B) ​1..*
C) ​0..*
D) ​0..0

Question 43

The line from the actor to the use case is called a(n) _____.

A) association
B) aggregation
C) lifeline
D) observation

Question 44

The Unified Modeling Language (UML) symbol for a use case is a(n) _____ with a label that describes the action or event.

A) rectangle
B) triangle
C) dashed line
D) oval

Question 45

In a sequence diagram, a lifeline is identified by a _____ line.

A) solid
B) dashed
C) red
D) curved

Question 46

In a class diagram, each class appears as a(n) _____, with the class name at the top, followed by the class's attributes and methods.

A) rectangle
B) circle
C) oval
D) triangle

Question 47

A(n) _____ shows the object classes and relationships involved in a use case.

A) class diagram
B) association diagram
C) use case diagram
D) modeling diagram

Question 48

In a use case, the _____ is shown as a stick figure with a label that identifies its role.

A) actor
B) association
C) linkage
D) service request

Question 49

For a use case diagram, the _____ shows what is included in the system and what is not included in the system.

A) system design
B) system boundary
C) system layout
D) system matrix

Question 50

When a use case diagram is created, the first step is to identify the system boundary, which is represented by a _____.

A) triangle
B) circle
C) rectangle
D) square

Question 51

For each use case, a _____ in the form of a table is developed to document the name of the use case, the actor, a description of the use case, and so forth.

A) use case description
B) use case diagram
C) use case schematic
D) use case outline

Question 52

In a sequence diagram, the _____ indicates when an object sends or receives a message.

A) request link
B) focus
C) command line
D) lifeline

Question 53

_____ describes how instances of one class relate to instances of another class.

A) A modifier
B) A deliverable
C) Scope
D) Cardinality

Question 54

A(n) _____ represents the steps in a specific business function or process.

A) relationship diagram
B) use case
C) data flow unit
D) interaction diagram

Question 55

In a sequence diagram, a _____ represents the time during which an object above it is able to interact with the other objects in the use case.

A) focus point
B) schematic matrix
C) validity link
D) lifeline

Question 56

In a use case, an external entity, called a(n) _____, initiates a use case by requesting the system to perform a function or process.

A) beneficiary
B) user
C) domain
D) actor

Question 57

A _____ is a visual summary of several related use cases within a system or subsystem.

A) use case description
B) use case diagram
C) use case schema
D) use case matrix

Question 58

A _____ shows how an object changes from one state to another, depending on events that affect the object.

A) state transition diagram
B) case tools diagram
C) scatter diagram
D) business process diagram

Question 59

In a sequence diagram, a _____ is identified by a line showing direction that runs between two objects.

A) message
B) procedure
C) method
D) response

Question 60

A(n) _____ graphically documents a use case by showing the classes, the messages, and the timing of the messages.

A) state transition diagram
B) sequence diagram
C) data flow diagram
D) scatter diagram

Question 61

The Unified Modeling Language (UML) uses a set of symbols to represent graphically the _____ within a system.

A) feasibility
B) accuracy
C) components
D) relationships

Question 62

Kevin, the trainee analyst at Lynach TechSystems, is in charge of allocating suitable Unified Modeling Language (UML) notations to a particular class diagram.
Which of the following relationships corresponds to the Unified Modeling Language (UML) notation on the class diagram 0..1 that Kevin has written?

A) An employee can have no direct reports or many direct reports.
B) An employee can have no spouse or one spouse.
C) An office manager manages one and only one office.
D) One order can include one or many items ordered.

Question 63

In structured analysis, _____ are transformed into data structures and program code.

A) processes
B) data stores
C) entities
D) keys

Question 64

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
It is a requirements modeling tool, but it can be used anytime during the systems development process.

Question 65

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
This is mainly used to support (object-oriented) O-O system analysis and to develop object models.

Question 66

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
This ensures consistency and provides common links so that once objects are described and used in one part of the design, they can be reused multiple times without further effort.

Question 67

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
It is used as a guide to continue to develop additional diagrams and documentation.

Question 68

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
After this is identified, the use cases are placed on the diagram, the actors are added, and the relationships are shown.

Question 69

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
This shows the order in which the actions take place and identify the outcomes.

Question 70

Object modeling requires many types of diagrams, creating which by hand is very time consuming and tedious, so systems analysts rely on _____ to speed up the process.

A) CRC modeling
B) extreme Programming (XP)
C) whiteboard sketches
D) CASE tools

Question 71

What do relationships enable objects to do? What is the strongest kind of relationship? Walk through an example that demonstrates your understanding of the concept.

Question 72

Explain a class diagram. Also, explain how a class diagram is like a data flow diagram (DFD).

Question 73

A sequence diagram _____.

A) is a dynamic model of a use case
B) is like a blueprint for all the objects within a class
C) is another term for a state transition diagram
D) shows the interaction among classes during a specified time period

Question 74

Kevin, the trainee analyst at Lynach TechSystems, is in charge of allocating suitable Unified Modeling Language (UML) notations to a particular class diagram.
In a given diagram, Kevin is designing a relationship in which a given employee can have no payroll deductions or he/she can have many deductions. Which of the following notations should Kevin write to mark this relationship?

A) ​0..1
B) 1
C) ​0..*
D) ​1..*

Question 75

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
In a sequence diagram, an X marks the end of this.

Question 76

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
In this, reading from left to right, the lines show direction and describe the action or event that causes a transition from one state to another.

Question 77

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
It is based on the idea that all data and methods are self-contained.

Question 78

Matching
​Identify the letter of the choice that best matches the phrase or definition.
a. ​Class diagram
b. ​Business process models (BPM)
c. ​Lifeline
d. ​Object relationship diagram
e. ​State transition diagram
f. Activity diagram
g. ​CASE tools
h. ​Black box
i. ​Unified Modeling Language (UML)
j. System boundary
In this, lines show relationships between classes and have labels identifying the action that relates the two classes.