Deck 6: Object Modeling

Question 1

Attributes are similar to adjectives that describe the characteristics of an object.

Answer 1

True

Question 2

A method is an adjective that describes the object's current status.

Answer 2

False

Question 3

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

Answer 3

True

Question 4

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

Question 5

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

Question 6

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

Question 7

Although the UML can be used for business process modeling and requirements modeling,it is mainly used to support O-O system analysis and to develop object models.

Question 8

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

Question 9

A control is a specific member of a class.

Question 10

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

Question 11

A use case represents the steps in a specific business function or process.

Question 12

An object includes data,but not the processes that affect that data.

Question 13

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

Question 14

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

Question 15

An object represents a real person,place,event,or transaction.

Question 16

The strongest relationship among objects is called inheritance.

Question 17

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

Question 18

Use cases cannot interact with other use cases.

Question 19

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

Question 20

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

Question 21

A black box wants and needs outside interference.

Question 22

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

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

Question 23

An object belongs to a group or category called a(n)_____.

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

Question 24

Systems analysts can create diagrams that appear to be correct but are in fact incorrect when it comes to the rules of the UML.

Question 25

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 26

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 27

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

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

Question 28

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

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

Question 29

Classes that send or receive messages are shown at the bottom of the sequence diagram.

Question 30

The focus indicates when an object sends or receives a message.

Question 31

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 32

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

Question 33

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 34

Object-oriented (O-O)analysis describes an information system by identifying things called objects.

Question 35

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

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

Question 36

Systems analysts define an object's attributes during the systems design process.

Question 37

A star marks the end of the lifeline.

Question 38

Encapsulation allows objects to be used as modular components anywhere in the system.

Question 39

There are few CASE tools tailored to UML.

Question 40

When the outcome of one use case is incorporated by another use case,we say that the second case uses the first case.

Question 41

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

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

Question 42

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

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

Question 43

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 44

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 45

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

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

Question 46

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

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

Question 47

_____ 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 48

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

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

Question 49

_____ 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 50

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

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

Question 51

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 52

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 53

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 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

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 56

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 57

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

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

Question 58

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 59

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 60

A bank account object 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 61

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 62

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 63

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

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

Question 64

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 65

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

Question 66

Define encapsulation using the black box concept.

Question 67

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

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

Question 68

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 69

Using the concept of polymorphism,define messages.

Question 70

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 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

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 73

Explain why tools are used in object modeling.

Question 74

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