Deck 18: Object-Oriented Design and Modeling Using the UML

Question 1

An approach used to specify the software solution in terms of collaborating objects, their attributes and their methods is called object oriented design.

Answer 1

True

Question 2

An interface class is an object class that provides the means by which an actor can interface with the system.

Answer 2

True

Question 3

A dependency relationship is illustrated with a dashed arrow line.

Answer 3

True

Question 4

Navigability is illustrated with an arrowhead pointing only to the direction a message can be sent.

Question 5

Visibility is the level of access an external object has to an attribute or method.

Question 6

Method is the software logic that is executed in response to a message.

Question 7

In a pure object-oriented environment every piece of code exists inside an object class.

Question 8

An object-oriented system is structured into at least three different types of object classes.

Question 9

Entity classes are identified during systems analysis and usually correspond to items in real life and contain information, known as attributes, that describes the different instances of the entity.

Question 10

Interface classes are a means through which the attributes will interface with the instances of an entity.

Question 11

The responsibility of the interface class is twofold: (1) it translates the user's input into information that the system can understand and use to process the business event; (2) it takes data pertaining to a business event and translates the data for appropriate presentation to the user.

Question 12

Controller classes implement the business logic or business rules of the system.

Question 13

System classes handle operating system-specific functionality.

Question 14

By employing persistence classes, it allows the entity classes to be more implementation neutral and potentially more reusable.

Question 15

By employing persistence classes, it allows the entity classes to be more implementation specific and potentially more usable.

Question 16

Persistence classes read and write to a database.

Question 17

Public attributes can be accessed and public methods can be invoked by any other method in any other class.

Question 18

Private attributes can be accessed and private methods can be invoked only by any method in the class in which the attribute or method is defined.

Question 19

A class responsibility is essentially the same thing as a class method.

Question 20

A class responsibility is implemented by the creation of one or more methods that may have to collaborate with other classes and methods.

Question 21

One technique for identifying behaviors is to search the use-case narrative for verb phrases.

Question 22

A class responsibility collaboration (CRC) card is a popular tool for documenting the behaviors and collaborations for an object.

Question 23

Sequence diagrams show us in great detail how the objects interact with each other in time sequence.

Question 24

In actor collaboration, the use case scenarios are acted out by the participants. The participants may assume the role of actors or object types that collaborate to process a hypothetical business event.

Question 25

Two overarching goals of object-oriented design are high coupling and low cohesion.

Question 26

Cohesion is the degree to which one class is connected to or relies upon other classes.

Question 27

Ideally, object classes created for one information system should be able to be reused in other information systems.

Question 28

Reusability is why operating system-specific code and database specific code are often designed into system and persistence classes.

Question 29

A design pattern is a common solution to a given problem in a given context.

Question 30

One advantage of using design patterns is that they provide designers with a short-hand notation for discussing design issues.

Question 31

GOF behavioral patterns provide guidance on the way in which classes interact to distribute responsibility.

Question 32

GOF creational patterns provide guidance for designing classes to instantiate new objects.

Question 33

GOF structural patterns provide guidance on how classes can be designed to form larger structures.

Question 34

GOF structural patterns provide guidance on the way in which classes interact to distribute responsibility.

Question 35

An object framework is a set of related, interacting objects that provide a well-defined set of services for accomplishing a task.

Question 36

A component is a group of objects packaged together into one unit. An example of a component is a dynamic link library (DLL) or executable file.

Question 37

A communication diagram is similar to a sequence diagram. But while a sequence diagram focuses on the structural organization of objects in a network format, a communication diagram focuses on timing of messages.

Question 38

Communication diagrams depict the organizational units of programming code and how they interact.

Question 39

Deployment diagrams are also implementation type diagrams that describe the physical architecture of the hardware and software in the system. They depict software components, processors, and devices that make up the systems architecture.

Question 40

A class that would have to change if the system was ported to another operating system would be a(n):

A) entity class
B) interface class
C) control class
D) persistence class
E) system class

Question 41

A class that contains the logic to run a use case would be a(n):

A) entity class
B) interface class
C) control class
D) persistence class
E) system class

Question 42

Which of the following is NOT a UML level of visibility?

A) private
B) protected
C) public
D) persistent
E) none of these

Question 43

Which of the following is NOT one of the activities of object-oriented design?

A) Modeling class interactions, behaviors, and states that support the use-case scenario.
B) Refining the use-case model to reflect the implementation environment.
C) Updating the class diagram to reflect the implementation environment.
D) Updating the ERD to reflect public attributes and persistence classes.
E) all of these are activities of object-oriented design

Question 44

This is a popular tool for documenting the behaviors and collaborations for an object.

A) cyclical redundancy collaboration (CRC) card
B) class responsibility collaboration (CRC) card
C) component responsibility collaboration (CRC) card
D) classical responsibility collaboration (CRC) card
E) none of these

Question 45

Which of the following is a tool that can be used for discovering class behaviors and responsibilities?

A) CRC card
B) sequence diagram
C) class diagram
D) a and b
E) all of these

Question 46

What is an object state?

A) a condition of the object at one time in its lifetime
B) an occurrence that triggers a change in an object
C) the act of simulating object behavior
D) a method that displays the current state of the object
E) none of these

Question 47

Which UML diagram models object state

A) sequence diagram
B) state machine diagram
C) class diagram
D) deployment diagram
E) communication diagram

Question 48

What did the Gang of Four do?

A) create the UML
B) popularize the use of design patterns
C) created CRC cards
D) created a popular object framework
E) battled Spider-man in issue 142

Question 49

Which of the following is NOT a GOF pattern category?

A) evolutional
B) structural
C) creational
D) behavioral
E) none of these

Question 50

If you needed to provide a stable interface to similar classes with different interfaces, you could use:

A) the strategy pattern
B) the adapter pattern
C) a creational pattern
D) the organizational pattern
E) none of these

Question 51

If you needed to design for varying and changing policy algorithms, you could use:

A) the strategy pattern
B) the adapter pattern
C) a creational pattern
D) the organizational pattern
E) none of these

Question 52

The process of using object-oriented techniques for designing a new system is referred to as:

A) object oriented design
B) class/object design
C) reverse engineering
D) database design
E) none of these

Question 53

A dialogue box is an example of a(n):

A) entity class
B) interface class
C) control class
D) persistence class
E) system class

Question 54

A class that handled reading and writing to a database would be an example of a(n):

A) entity class
B) interface class
C) control class
D) persistence class
E) system class

Question 55

The student class in an enrollment system would be an example of a(n):

A) entity class
B) interface class
C) control class
D) persistence class
E) system class

Question 56

What do you call a set of related, interacting objects that provide a well-defined set of services for accomplishing a task?

A) class framework
B) scenario
C) object framework
D) entity framework
E) none of these

Question 57

This is a group of objects packaged together into one unit. An example is a dynamic link library (DLL) or executable file.

A) scenario
B) module
C) subprogram
D) component
E) none of these

Question 58

What is a design pattern?

A) the obligation that an object has to provide a service when requested
B) a common solution to a given problem in a given context.
C) a set of related, interacting objects that provide a set of services.
D) a group of objects packaged together.
E) none of these

Question 59

In which of the following are the use case scenarios acted out by the participants, where participants may assume the role of actors or object types that collaborate to process a hypothetical business event?

A) scenarios
B) plays
C) role playing
D) action play plans
E) none of these

Question 60

What diagram depicts how objects collaborate in message sequence to satisfy the functionality of a use case?

A) state
B) component
C) sequence
D) deployment
E) communication

Question 61

What diagram depicts the life cycle of a single object?

A) state
B) component
C) sequence
D) deployment
E) communication

Question 62

What diagram depicts the interaction of objects, focusing on their structural organization?

A) state
B) component
C) sequence
D) deployment
E) communication

Question 63

What type of diagram is an implementation type diagram and used to graphically depict the physical architecture of the software system?

A) state
B) component
C) sequence
D) deployment
E) communication

Question 64

What type of diagram is also an implementation type diagram that describes the physical architecture of the hardware and software in the system and depicts software components, processors, and devices that make up the systems architecture?

A) state
B) component
C) sequence
D) deployment
E) communication

Question 65

Attributes and methods that are visible from any method in the class in which the attribute or method is defined or in subclasses of that class are said to be:

A) private
B) protected
C) public
D) persistent
E) none of these

Question 66

Attributes and methods that are visible from any method in any class are said to be:

A) private
B) protected
C) public
D) persistent
E) none of these

Question 67

Attributes and methods that are visible from any method in the class in which the attribute or method is defined are said to be:

A) private
B) protected
C) public
D) persistent
E) none of these

Question 68

Which of the following steps are NOT done in transforming the OOA class diagram into a design class diagram?

A) add design object
B) add attribute visibility
C) add methods
D) add dependency relationships
E) all of these should be done

Question 69

Which maxim best describes the rationale for using design patterns?

A) A stitch in time saves nine
B) Don't reinvent the wheel
C) Haste makes waste
D) A rolling stone gathers no moss
E) The squeaky wheel gets the grease

Question 70

Which of the following is NOT an activity done in constructing a state machine diagram?

A) Identify state transition paths
B) Identify initial and final states
C) Identify triggers
D) Identify other states an object may have during its lifetime
E) Identify other objects that trigger changes in the object's states

Question 71

A(n) __________________________ is a group of objects packaged together into one unit. An example is a dynamic link library (DLL) or executable file.

Question 72

All objects are said to have __________________ - the value of its attributes at one point in time.

Question 73

A(n) _____________________________ triggers the change in state when something happens or when the value of one of the attributes changes.

Question 74

___________________________________ are a common solution to a given problem in a context.

Question 75

A(n) ________________________________________ card is a popular tool for documenting the behaviors and collaborations for an object.

Question 76

If an object calls its own method, it is called a(n) _______________.

Question 77

In ______________________________________, the use case scenarios are acted out by the participants. The participants may assume the role of actors or object types that collaborate to process a hypothetical business event.

Question 78

________________________________ diagrams show us in great detail how the objects interact with each other over time.

Question 79

_______________________________ is illustrated with an arrowhead pointing only to the direction a message can be sent.

Question 80

__________________________________ diagrams show us how objects collaborate to satisfy the functionality of a use case, focusing on the structural organization of objects in a network format.