Deck 13: Object-Oriented Design: Use Case Realization

Question 1

​The starting point for identifying messages in detailed design of a use case is always the SSD.

Answer 1

True

Question 2

​The activation lifeline is depicted by a vertical dashed line under an object.

Answer 2

False

Question 3

​Adding a use case controller to a sequence diagram is an example of applying a design pattern.

Answer 3

True

Question 4

​The true/false condition on a message indicates whether the method on the destination object will execute.

Question 5

​Since updating a design class diagram is done after the use case realization is complete,visibility information is no longer necessary.

Question 6

​The perfect technology assumption means not to worry about issues such as user security.

Question 7

​The code "if (someObject == null)" is part of the factory pattern.

Question 8

​A loop or repeating message or messages in a sequence diagram is depicted by a rectangle box.

Question 9

​The first-cut DCD includes method signatures.

Question 10

​Dependency relationships cannot exist between classes within packages.

Question 11

​The perfect memory assumption means that there is always adequate memory to execute the program.

Question 12

​An interaction diagram is a subclass of a sequence diagram.

Question 13

​The controller object is usually part of view layer.

Question 14

​A timeline on a communication diagram indicates the sequence of the messages.

Question 15

​Links on communication diagram simple show the flow of messages and are not the associations between classes.

Question 16

​There are two preferred methods to accessing the database. One is to have newly instantiated object call the data access object. The other is to let the controller access the data access object.

Question 17

​Design class diagrams and interaction diagrams should be developed independent of each other.

Question 18

​The perfect solution assumption means that we do not worry about exception conditions.

Question 19

​The best technique for accessing the database when multiple objects are needed is just to let the data access object instantiate objects.

Question 20

​The initial version of a communication diagram contains view layer and business layer.

Question 21

​It is better to have the data access object create a new object when multiple objects may be created.

Question 22

​What is the least cohesive approach in creating use case controllers in a system?

A)Define a single controller for all use cases.
B)​Define several controllers, each with a specific set of responsibilities
C)Create a single controller for a single subsystem
D)​Create one controller per use case

Question 23

​A return value in an interaction diagram is often a named object.

Question 24

​On a sequence diagram constructor messages are always sent directly to the object itself.

Question 25

​Which is the correct notation for a message label on a sequence diagram?

A)* [true/false]RetVal := name (param)
B)​[true/false]RetVal == name (param)
C)[true/false]seq# RetVal := name (param)
D)​*[true/false] seq# Retval := name (param)

Question 26

​The adapter pattern facilitates changing the API method names in a system.

Question 27

​Detailed design of use cases using communication diagrams requires that each input message is analyzed and extended.

Question 28

​A singleton pattern is a type of factory pattern.

Question 29

​On a communication diagram a common method to indicate a return value is with a dashed arrow.

Question 30

​A lifeline indicates when a method is executing for a destination object.​

Question 31

​The realization of a use case-determining what objects collaborate by sending messages to each other to carry out the use case-is done through the development of a(n)____ diagram.

A)system sequence
B)​package
C)interaction
D)​design class

Question 32

​System designers frequently create a class called a ____ that can serve as a collection point for incoming messages.

A)switchboard
B)​message controller
C)use case controller
D)​message collector

Question 33

​On a sequence diagram,view layer objects send messages to the controller.

Question 34

​Messages on communication diagrams use the same syntax as messages from on sequence diagrams.

Question 35

​When a message is sent from an originating object to a destination object it means that ______.

A)data is being passed from the origin object to the destination object
B)​a transition is occurring between the objects
C)a method is being invoked on the originating object
D)​a method is being invoked on the destination object

Question 36

​On a sequence diagram activation lifelines are attached to lifelines.

Question 37

​Which of the following is NOT a valid technique to return data from an input message?

A)A return object name
B)​A return message
C)A return value on an input message
D)​A return condition name

Question 38

​Message names should be given to indicate the service requested from the destination object.

Question 39

​On a sequence diagram the messages are numbered to indicate the order of firing.

Question 40

​Messages are comprised of five elements,all of which are optional except the method name.

Question 41

​The perfect technology assumption implies that _______.

A)the equipment will work without any problems
B)​the users understand the technology
C)issues related to technology are ignored
D)​issues related to scalability (high volumes) are ignored

Question 42

​Data access layer classes should ____.

A)process all business rules with appropriate logic
B)​accept input data
C)display data fields
D)​contain Structure Query Language (SQL) statements

Question 43

​The following notation "anOrd:Order" can be interpreted as follows:

A)Order is a class. anOrd is the identifier of an object in the class
B)​Order is an object. anOrd is the identifier for that order
C)Order is a class.  anOrd is an object in that class
D)​Order is an object.  anOrd is the reference to that object

Question 44

​Communication diagrams indicates the order of the messages with ____.

A)sequence numbers
B)​activation lifelines
C)arrows
D)​links

Question 45

​Which design model provides information for a design class diagram?

A)Deployment diagram
B)​Interaction diagram
C)Statechart diagram
D)​Package diagram

Question 46

​____ methods must be included in a design class diagram.

A)Constructor
B)​Use case specific
C)Getter
D)​Setter

Question 47

​Which of the following is NOT a component of the design pattern template?

A)Problem that requires a solution
B)​Example of the pattern
C)Description of when the pattern does not apply
D)​Consequences of the pattern

Question 48

​In a sequence when one assumes that the objects are already available to receive messages,that is considered to be the _______.

A)perfect technology assumption
B)​perfect memory assumption
C)perfect solution assumption
D)​perfect design assumption

Question 49

​When denoting a specific object in a sequence diagram,a ____ serves as the divider between the object name and the specific object identifier.

A)double colon
B)​colon
C)dash
D)​dot

Question 50

​Which of the following symbols is used in a communication diagram,but not in a sequence diagram?

A)Message arrow
B)​Object
C)Activation lifeline
D)​Link

Question 51

​View layer classes should do all of the following EXCEPT _______.

A)capture clicks and data entry
B)​start and shut down the system
C)create problem domain classes
D)​display forms

Question 52

​The final step in the object-oriented design (OOD)process consists of developing the ____.

A)attributes of the design classes
B)​method names of the design classes
C)interaction diagrams
D)​package diagrams

Question 53

​The primary models used for OO detailed design are ____ diagrams.

A)design class and statechart
B)​package and statechart
C)package and deployment
D)​design class and interaction

Question 54

​When a use case controller receives the initial request for an inquiry when the data access layer is added,it first ____.

A)begins the process to initialize the necessary data access objects in memory
B)​sends a message to the database to see if it is available
C)sends a message to the appropriate data access object to retrieve the data
D)​sends a return message to the view layer

Question 55

​Developing a(n)____ diagram is a multistep process of determining which objects work together and how they work together.

A)design class
B)​interaction
C)state machine
D)​package

Question 56

​Which of the following is an example of an interaction diagram?

A)Design class diagram
B)​Data access diagram
C)Package diagram
D)​Communication diagram

Question 57

​What is the first step in constructing a first-cut sequence diagram from the elements of the system sequence diagram (SSD)?

A)Determine which messages must be sent
B)​Create a use case controller
C)Replace the :System object with all the objects that must collaborate
D)​Select an input message from the use case

Question 58

​User interface objects in a sequence diagram often are labeled with the stereotype ____.

A)entity
B)​view or boundary
C)control
D)​persistent

Question 59

​Domain layer classes should ____.

A)prepare persistent classes for storage to the database
B)​start up and shut down the system
C)edit and validate input data
D)​establish and maintain connections to the database

Question 60

​____ diagrams partition a design class diagram into related functions.

A)Statechart
B)​Sequence
C)Interaction
D)​Package

Question 61

​A dashed arrow represents a(n)_______  relationship in a package diagram.

Question 62

​The ________  ________ DCD usually contains no method signatures,but does contain navigation visibility.

Question 63

​What is the process of detail design for a particular use case by elaborating the messages that are necessary to execute the use case?

Question 64

​The Sales subsystem needs to instantiate a new cart object.How should this be done?

A)Let the factory object do it.
B)​Let the view layer object do it.
C)Let the controller object do it.
D)​Let the customer object do it.

Question 65

​A representation of a period during which a method of an object is alive and executing is called its ______ ______.

Question 66

​A type of interaction diagram that does not have activation lifelines is called a ____________ diagram.

Question 67

​A labeled arrow between lifelines on a sequence diagram is called a(n)_______________.

Question 68

​A type of interaction diagram that emphasizes the order of the messages between objects for a specific use case is called a(n)________  diagram.

Question 69

​What is the correct syntax notation for a message on a communication diagram?

A)[t/f condition] seq-numb: ret-value := msg-name (para-list)
B)​[t/f condition] ret-value := msg-name (para-list)
C)[t/f condition] seq-numb: ret-value = msg-name (para-list)
D)​[t/f condition] seq-numb  ret-value = msg-name (para-list)

Question 70

​The _________________ pattern is a based on a class that helps to decouple the view layer from the business logic layer by receiving all input messages.

Question 71

​In a communication diagram,a(n)____________________ is used to show that two objects share a message.

Question 72

​A type of interaction diagram that emphasizes the objects that send and receive messages for a specific use case is called a(n)_______ diagram.

Question 73

​_____________   ____________ are relationships among elements that indicate which elements affect other elements in a system.

Question 74

Given the following code, identify the pattern. Class MyBuilder
{ static MyBuilder builder = null;
{ if builder == null {builder = new MyBuilder( );
Return builder;
}

A)Factory Pattern
B)​Singleton Pattern
C)Factory Method Pattern
D)​Adapter Pattern

Question 75

​A type of diagram that is used to define groups of classes as a subsystem is called a _______________ diagram.

Question 76

​Standard design techniques and templates that are recognized as good practice are called _________  ________.

Question 77

​Which of the following figures is NOT correct?

A)A
B)​B
C)C
D)​D

Question 78

​A different implementation of a function is required in an existing system. The best way to integrate this function into the system is ______

A)to write the code in a new class
B)​to write the code in an existing class
C)with the factory pattern
D)​​with the adapter pattern

Question 79

​The ______ ______ classes contain the user interface classes.

Question 80

​The _____________ pattern can be used to connect two disparate systems.