Deck 6: Object Modeling

Question 1

Objects can have a specific attribute called a(n) ____.

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

Answer 1

A

Question 2

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

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

Answer 2

D

Question 3

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

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

Answer 3

C

Question 4

A major advantage of 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 5

Your red Mustang is a(n) ____ of the CAR class.

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

Question 6

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

A)UML
B)Java
C)UNIX
D)DFD

Question 7

An object has certain ____, like the make, model, and color of a car.

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

Question 8

The UML represents an object as a(n) ____ with the object name at the top, followed by the object's attributes and methods.

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

Question 9

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

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

Question 10

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

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

Question 11

A(n) ____ defines specific tasks that an object can perform.

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

Question 12

____ resemble verbs that describe what and how an object does something.

A)Methods
B)Commands
C)Messages
D)Attributes

Question 13

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

A)dictum
B)message
C)statement
D)baseline

Question 14

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

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

Question 15

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

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

Question 16

Your car performs a(n) ____ called OPERATE WIPERS when you send a message by moving the proper control.

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

Question 17

____ are characteristics that describe the object.

A)Indices
B)Attributes
C)Packets
D)Keys

Question 18

An object's ____ are the tasks or functions the object performs.

A)messages
B)commands
C)instances
D)methods

Question 19

A(n) ____ represents a real person, place, event, or transaction.

A)object
B)instance
C)command
D)method

Question 20

If ____ are similar to adjectives that describe the characteristics of an object, objects are similar to nouns.

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

Question 21

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 22

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

A)association
B)highlight
C)lifeline
D)linkage

Question 23

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

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

Question 24

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

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

Question 25

The 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 26

When you create a use case diagram, the first step is to identify the system boundary, which is represented by a ____.

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

Question 27

Inheritance enables a ____ to derive one or more of its attributes from a parent.

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

Question 28

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

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

Question 29

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

Question 30

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

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

Question 31

When you construct a ____, you review the use case and identify the classes that participate in the underlying business process.

A)class diagram
B)sequence diagram
C)use case schematic
D)DFD

Question 32

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

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

Question 33

____ enables an object to derive one or more of its attributes from another object.

A)Concatenation
B)Encapsulation
C)Inheritance
D)Polymorphism

Question 34

Which of the following is not represented by a symbol in a sequence diagram?

A)Classes
B)Indices
C)Lifelines
D)Messages

Question 35

The UML notation ____ identifies a zero or many relation.

A) 0..1
B)1..*
C) 0..*
D) 0..0

Question 36

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

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

Question 37

An object ____ diagram shows the objects and how they interact to perform business functions and transactions.

A)relationship
B)precedent
C)antecedent
D)parent

Question 38

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

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

Question 39

As shown in the accompanying figure, objects within a class can be grouped into ____, which are more specific categories within a class.

A)schedules
B)units
C)subclasses
D)clusters

Question 40

In a use case, an external entity is called a(n) ____.

A)benefit
B)cost
C)domain
D)actor

Question 41

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

Question 42

All relationships have equal weight; none is stronger than any other.

Question 43

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

Question 44

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

Question 45

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

Question 46

In a sequence diagram, a(n) lifeline is identified by a line showing direction that runs between two objects. _________________________

Question 47

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

Question 48

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

Question 49

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 50

A use case description documents (among other things) ____.

A)a description of alternative courses of action
B)postconditions
C)preconditions
D)assumptions

Question 51

A gas pump is an example of a black box.

Question 52

An object treats data and processes separately.

Question 53

Customer objects can perform specific tasks, such as placing an order or paying a bill.

Question 54

The UML uses a set of symbols to represent graphically the ____ within a system.

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

Question 55

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

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

Question 56

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

Question 57

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

Question 58

A major advantage of O-O designs is that systems analysts can save time and avoid errors by using modular objects.

Question 59

Which of the following is an attribute of a car?

A)make
B)model
C)parking
D)color

Question 60

A class can belong to a more general category called a(n) subclass. _________________________

Question 61

In a use case, the ____________________ is shown as a stick figure.

Question 62

In a state transition diagram, the circle to the left is the final state.

Question 63

If you do not use a CASE-generated model, it is not necessary that a diagram or object definition be supported by documentation.

Question 64

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

Question 65

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

Question 66

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

Question 67

Unlike a DFD, a class diagram is a logical model, which evolves into a physical model and finally becomes a functioning information system.

Question 68

When you create an object relationship diagram, it will serve as a guide as you continue to develop additional diagrams and documentation.

Question 69

When you identify use cases, it is important to keep all related transactions separate.

Question 70

After you identify the objects, classes, and relationships, you are ready to prepare an object relationship diagram that will provide an overview of the system.

Question 71

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

Question 72

Object-oriented designs typically are implemented with ____________________ programming languages.

Question 73

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

Question 74

In a sequence diagram, a message is identified by a narrow vertical shape that covers the lifeline.

Question 75

Sequence diagrams, state transition diagrams, and activity diagrams are dynamic modeling tools that can help a systems analyst understand how objects behave and interact with the system.

Question 76

Use cases cannot interact with other use cases.

Question 77

You can view an object as a(n) ____________________, because a message to the object triggers changes within the object without specifying how the changes must be carried out.

Question 78

To create use cases, you start by reviewing the information that you gathered during the requirements modeling phase.

Question 79

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

Question 80

In a sequence diagram, classes that send or receive messages are shown at the bottom of the diagram.