Chapter 6 - Object Modeling

Question 1

In object-oriented analysis or programming, an _______ represents a real person, place, event, or transaction.

Answer 1

object

Question 2

Describes objects, which combine data and processes. _________ are the end product of O-O analysis.

Answer 2

object model

Question 3

A single characteristic or fact about an entity. An __________ is the smallest piece of data that has meaning within an information system. For example, a Social Security number or company name could be examples of an attribute. In object-oriented analysis, an attribute is part of a class diagram that describes the characteristics of objects in the class.

Answer 3

attributes

Question 4

An adjective that describes an object’s current status (e.g., a student could be a CURRENT, FUTURE, or PAST student).

Answer 4

state

Question 5

An O-O command that tells an object to perform a certain method.

Answer 5

message

Question 6

The concept that a message gives different meanings to different objects (e.g., a GOOD NIGHT message might produce different results depending if it is received by a child or the family dog).

Answer 6

polymorphism

Question 7

The idea that all data and methods are selfcontained, as in a black box.

Answer 7

encapsulation

Question 8

A specific member of a class.

Answer 8

instance

Question 9

A further division of objects in a class. ___________ are more specific categories within a class.

Answer 9

subclasses

Question 10

A more generalized category to which objects may belong

Answer 10

superclass

Question 11

Enable objects to communicate and interact as they perform the business functions and transactions required by a system. ___________ 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.

Answer 11

Relationships

Question 12

A type of object relationship. ____________ enables an object to derive one or more of its attributes from another object (e.g., an INSTRUCTOR object may inherit many traits from the EMPLOYEE object, such as hire date).

Answer 12

Inheritance

Question 13

In inheritance, a ______ is the object that derives one or more attributes from another object, called the parent.

Answer 13

child

Question 14

In inheritance, a _______ is the object from which the other object, the child, derives one or more attributes.

Answer 14

parent

Question 15

Represents the steps in a specific business function or process in UML.

Answer 15

use case

Question 16

A description in UML that documents the name of the use case, the actor, a description of the use case, a step-by-step list of the tasks required for successful completion, and other key descriptions and assumptions.

Answer 16

use case description

Question 17

Shows what is included and excluded from a system. Depicted by a shaded rectangle in use case diagrams.

Answer 17

system boundary

Question 18

A detailed view of a single use case, showing the classes that participate in the use case, and documenting the relationship among the classes.

Answer 18

class diagram

Question 19

A concept that describes how instances of one entity relate to instances of another entity. Described in entity-relationship diagrams by notation that indicates combinations that include zero or one-to-many, one-to-one, and many-to-many

Answer 19

cardinality

Question 20

In a sequence diagram, a ________ is used to represent the time during which the object above it is able to interact with the other objects in the use case.

Answer 20

lifeline

Question 21

In a sequence diagram, a ______ indicates when an object sends or receives a message. It is indicated by a narrow vertical rectangle that covers the lifeline.

Answer 21

focus

Question 22

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

Answer 22

state transition diagram

Question 23

A diagram that resembles a horizontal flowchart that shows the actions and events as they occur. ____________ show the order in which actions take place and identify the outcome.

Answer 23

activity diagram

Question 24

Defines specific tasks that an object must perform. Describes what and how an object does something.

Answer 24

method