Deck 6: Object Modeling

Question 1

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

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

Answer 1

D

Question 2

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

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

Answer 2

D

Question 3

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

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

Answer 3

A

Question 4

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 5

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 6

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

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

Question 7

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

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

Question 8

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

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

Question 9

Objects can have a specific attribute called a(n) ____, which describes the object's current status.

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

Question 10

____ are characteristics that describe the object.

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

Question 11

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

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

Question 12

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 13

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

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

Question 14

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 15

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

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

Question 16

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

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

Question 17

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

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

Question 18

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

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

Question 19

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

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

Question 20

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 21

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

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

Question 22

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 23

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

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

Question 24

Sequence diagrams include symbols that represent all of the following EXCEPT ____.

A) classes
B) indices
C) lifelines
D) messages

Question 25

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

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

Question 26

The UML notation ____ identifies a zero or many relation.

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

Question 27

____ 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 28

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

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

Question 29

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 30

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 31

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

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

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

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

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

Question 34

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

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

Question 35

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 36

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

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

Question 37

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

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

Question 38

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

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

Question 39

____ 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 40

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 41

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

Question 42

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

Question 43

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

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

Question 44

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

Question 45

Which of the following is an attribute of a car?

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

Question 46

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

Question 47

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

Question 48

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

Question 49

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

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

Question 50

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

Question 51

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

Question 52

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

Question 53

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

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

Question 54

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

Question 55

A gas pump is an example of a black box.

Question 56

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 57

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

Question 58

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

Question 59

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 60

An object treats data and processes separately.

Question 61

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

Question 62

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

Question 63

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

Question 64

Use cases cannot interact with other use cases.

Question 65

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 66

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

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

Question 69

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 70

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

Question 71

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

Question 72

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

Question 73

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

Question 74

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 75

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

Question 76

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

Question 77

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

Question 78

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

Question 79

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

Question 80

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