Unit 6

Question 1

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

Answer 1

system boundary

Question 2

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

Answer 2

superclass

Question 3

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

Answer 3

Unified Modeling Language (UML)

Question 4

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

Answer 4

attributes

Question 5

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

Answer 5

association

Question 6

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

Answer 6

class diagram

Question 7

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

Answer 7

encapsulation

Question 8

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

Answer 8

polymorphism

Question 9

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

Answer 9

True

Question 10

A black box wants and needs outside interference.

Answer 10

False

Question 11

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

Answer 11

False

Question 12

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

Answer 12

True

Question 13

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

Answer 13

True

Question 14

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

Answer 14

False

Question 15

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

Answer 15

True

Question 16

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

Answer 16

True

Question 17

A collection of related webpages is called a _____.

Answer 17

website

Question 18

Which tool is used to apply multiple search engines simultaneously?

Answer 18

meta-search engine

Question 19

When a person subscribes to a list, he or she can receive a collection of messages called a _____, which contains a summary of the postings for a specific time interval (e.g., daily).

Answer 19

digest

Question 20

Which operator is used to exclude certain records in a search?

Answer 20

NOT

Question 21

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

Answer 21

False

Question 22

There are few CASE tools tailored to UML

Answer 22

False

Question 23

A control is a specific member of a class.

Answer 23

False

Question 24

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

Answer 24

False

Question 25

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

Answer 25

Relationships

Question 26

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.

Answer 26

rectangle

Question 27

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

Answer 27

object relationship diagram

Question 28

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

Answer 28

State

Question 29

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

Answer 29

Methods