CS 682 chapter 10

True

59. In a system sequence diagram a frame can show loops or optional steps.

False Rationale: This describes encapsulation, not behavior.

6. Behavior is the packaging of several items together into one unit.

False Rationale: An object association matrix is a tool for determining object class relationships.

60. An object association matrix is a tool for prioritizing use cases.

True

62. There is no need for foreign keys in a class diagram.

True

1. Object-oriented analysis (OOA) techniques are used to (1) study existing objects to see if they can be reused or adapted for new uses; and (2) define new or modified objects that will be combined with existing objects into a useful business computing application.

True

10. A supertype is an object class whose instances store attributes that are common to one or more subtypes of the object class.

extension

100. A use case may contain complex functionality consisting of several steps that are difficult to understand. To simplify the use case and make it more easily understood, we could extract the more complex steps into their own use cases. This type of use case is called a(n) ______________________________ use case in that it extends the functionality of the original use case.

False Rationale: A supertype is an object class whose instances store attributes that are common to one or more subtypes of the object class.

11. A subtype is an object class whose instances store attributes that are common to one or more supertypes of the object class.

True

12. An object class relationship is a natural business association that exists between one or more object classes.

True

13. A message is passed when one object invokes one or more of another object's methods (behaviors) to request information or some action.

False Rationale: A message is passed when one object invokes one or more of another object's methods (behaviors) to request information or some action.

14. An attribute is passed when one object invokes one or more of another object's methods (behaviors) to request information or some action.

True

15. Polymorphism means "many forms." Applied to object-oriented techniques, it means that the same named behavior may be completed differently for different object classes.

False Rationale: Polymorphism means "many forms." Applied to object-oriented techniques, it means that the same named behavior may be completed differently for different object classes.

16. Encapsulation means "many forms." Applied to object-oriented techniques, it means that the same named behavior may be completed differently for different object classes.

True

17. Use case diagrams graphically depict the interactions between the system and external systems and users. In other words, they graphically describe who will use the system and in what ways the user expects to interact with the system.

True

18. Activity diagrams depict the sequential flow of a use case or business process.

True

19. Class diagrams depict the system's object structure. They show object classes that the system is composed of as well as the relationships between those classes.

True

2. An object is something that is or is capable of being seen, touched, or otherwise sensed, and about which users store data and associate behavior.

True

20. There are thirteen diagrams used in UML 2.0.

False Rationale: The current version of UML is 2.0.

21. The current version of UML is 3.0.

True

22. The UML does not prescribe a method for developing systems - only a notation for modeling.

False Rationale: This describes State Machine diagrams.

23. Class diagrams model how events can change the state of an object class over its lifetime.

True

24. A subtype can have a behavior with the same name as a behavior in it's supertype.

True

25. The only way to access or change an object's attributes is through that object's behaviors.

True

26. If exam is an object class, then your exam paper is an object instance.

True

27. An object class can be referred to simply as a class.

False Rationale: Both Student and Teacher would be subtypes of a Person object class.

28. A Student object class and a Teacher object class would have a supertype/subtype relationship.

True

29. The concept of multiplicity is essentially the same concept as cardinality in data modeling

True

3. Attributes are the data that represents characteristics of interest about an object.

False Rationale: In UML 2.0 the notation for aggregation has been dropped.

30. In UML 2.0 the notation for composition has been dropped.

True

31. Composition is drawn with a filled diamond.

False

32. One of the UML 2.0 diagrams is the collaboration diagram.

False Rationale: The requirements use-case model is refined into an analysis use-case model.

40. In object-oriented analysis, the requirements use-case model is used as is.

False Rationale: The analysis use cases should still be implementation independent.

41. Once all the requirements use cases have been reviewed and approved by the users, each use case will be refined to include more information to specify the system functionality in detail. The resulting use cases are called analysis use cases and should represent any implementation specifics.

True

42. A use case may contain complex functionality consisting of several steps that are difficult to understand. To simplify the use case and make it more easily understood, we could extract the more complex steps into their own use cases. This type of use case is called an extension use case in that it extends the functionality of the original use case.

True

43. An abstract use case represents a form of "reuse."

True

44. An abstract use case is available for referencing (or use) by any other use case that requires its functionality.

True

45. New use cases may be added during object-oriented analysis.

True

46. New actors may be added to a use-case diagram during object-oriented analysis.

True

47. In composition, the "whole" is responsible for the creation and destruction of its parts.

True

48. A class is said to be persistent if it outlives the execution of a program.

True

49. The steps of a use case can be modeled with an activity diagram.

True

5. Behavior refers to those things that the object can do and that correspond to functions that act on the object's data (or attributes). This is commonly referred to as a method, operation or service.

True

50. An activity diagram begins with an initial node.

True

51. At least one activity diagram can be constructed for each use case.

False Rationale: To specify who does what, you can divide an activity diagram into partitions.

52. To specify who does what, you can divide an activity diagram into flows.

False Rationale: Most flows do not need words to identify them unless coming out of decisions.

53. Every flow on an activity diagram needs words to identify them.

False Rationale: On an activity diagram all actions coming into a join must be completed before processing continues.

54. On an activity diagram all actions coming into a fork must be completed before processing continues.

True

55. On an activity diagram a subactivity indicator indicates a separate activity diagram.

True

56. A system sequence diagram depicts the interaction between an actor and the system for a use case scenario.

False Rationale: Activation bars indicate the period of time when the participant is active in the interaction

57. In a system sequence diagram lifelines indicate the period of time when the participant is active in the interaction.

True

58. In a system sequence diagram an input message called finalizeOrder would be proper according to UML convention.

False Rationale: There is no need in a class diagram to include a primary key attribute unless it is a real business attribute.

61. Every object class should have a primary key attribute identified.

Answer: A

63. The data associated with an object are called: A) behaviors B) attributes C) inheritance D) encapsulation E) polymorphism

Answer: E

64. In object-oriented analysis we evolve the requirements use case model into the analysis use-case model by performing the following steps: A) identify, define and document new actors B) identify, define and document new use cases C) .identify any reuse possibilities D) refine the use case model diagram E) all of these

Answer: D

65. The messages of a use case can be graphically depicted with a(n): A) system analysis use case B) use case diagram C) activity diagram D) system sequence diagram E) none of these

Answer: A

66. In an activity diagram you would combine flows that were previously separated by decision using a(n): A) merge B) fork C) join D) connector E) none of these

Answer: C

67. If an object class outlives the execution of the program, it is said to be: A) permanent B) transient C) persistent D) an instance E) none of these

Answer: B

68. Which of the following people were not involved in developing object-oriented analysis? A) Grady Booch B) E.F. Codd C) Ivar Jacobson D) James Rumbaugh E) all of these were involved in developing object-oriented analysis

Answer: D

69. A set of modeling conventions that is used to specify or describe a software system in terms of objects is: A) data flow diagrams B) object flow diagrams C) attribute object diagrams D) unified modeling language E) none of these

True

7. An object class is a set of object instances that share the same attributes and behavior.

encapsulation

70. The packaging of an object with its behaviors is called: A) behaviors B) attributes C) inheritance D) encapsulation E) polymorphism

all of these

71. Those things that an object can do and that correspond to functions that act on the object's data (or attributes) is known as a(n): A) method B) behavior C) operation D) service E) all of these

aggregation

72. Which type of class relationship can be described as "is part of" or "is composed of"? A) generalization/specialization B) association C) aggregation D) multiplicity E) inheritance

inheritance

73. The condition where the methods and/or attributes defined in an object class can be inherited or reused by another object class is known as: A) encapsulation B) generalization C) inheritance D) specialization E) none of these

generalization/specialization

74. A technique wherein the attributes and behaviors are common to several types of object classes are grouped into their own class, called a supertype, is known as: A) encapsulation B) generalization C) inheritance D) generalization/specialization E) none of these

a subtype

75. An object class whose instances inherit some common attributes from a class supertype and then add other attributes that are unique to its instances is known as: A) a supertype B) a subtype C) a behavior D) a message E) none of these

Answer: B

76. What defines how many instances of one object class can be associated with one instance of another object class? A) associativity B) multiplicity C) relationship D) inheritance E) none of these

class diagrams

77. Diagrams that depict the system's object structure and show object classes that the system is composed of as well as the relationships between those object classes are known as: A) use case diagrams B) class diagrams C) object diagrams D) sequence diagrams E) none of these

generalization/specialization

78. Which type of class relationship can be described as "is a"? A) generalization/specialization B) association C) aggregation D) multiplicity E) inheritance

0..*

79. In a Class Diagram a multiplicity of zero or more would be designated by: A) 0..* B) 0-* C) a crow's foot D) a 0 and a vertical line E) none of these

False Rationale: An object class is a set of object instances that share the same attributes and behavior.

8. An object instance is a set of object classes that share the same attributes and behavior.

activity diagram

80. Which kind of diagram shows aggregation? A) activity diagram B) class diagram C) system sequence diagram D) class relationship diagram E) none of these

a single box

81. In a system sequence diagram, the system is depicted as: A) a single box B) one or more rounded rectangles C) lifelines D) object classes E) none of these

optional steps

82. Which of the following can NOT be shown in a system sequence diagram? A) a receiver actor B) loops C) optional steps D) object classes E) system outputs

actors

83. Which of the following can NOT be shown in an activity diagram? A) decisions B) concurrent actions C) actors D) UML convention for messages E) none of these

ItemSelections(Items, Quantities)

84. Which of the following messages uses proper UML notation? A) Item Selections B) ItemSelections(items, quantities) C) ItemSelections(Items, Quantities) D) itemSelections(items, quantities) E) Itemselections(ITEMS,QUANTITIES)

narrative

85. The use case _____________________________ is used to textually describe the sequence of steps of each interaction.

Answer: Class

86. ________________________ diagrams depict the system's object structure. They show object classes that the system is composed of as well as the relationships between those classes.

System sequence

87. _____________________________ diagrams depict the interaction between an actor and the system for a use case scenario.

Sequence

88. __________________________________ diagrams graphically depict how objects interact with each other via messages in execution of a use case or operation. They illustrate how messages are sent and received between objects and in what sequence.

Activation bars

89. ___________________________________ are set over the lifelines in a system sequence diagram to indicate the period of time when the participant is active in the interaction.

True

9. Inheritance means that methods and attributes defined in an object class can be inherited or reused by another object class.

override

90. A behavior in a subtype is said to _____________ a behavior with the same name in its supertype.

decision, merge

91. In an activity diagram the diamond shape is used to represent a __________ or a ____________.

subactivity indicator (action broken out in another activity diagram)

92. In an activity diagram a rake symbol is used to represent a ______________________.

join

93. In an activity diagram a black bar with tow or more flows coming in an one flow going out is called a ________________.

partitions (swimlanes)

94. To show who does what in an activity diagram you would divide it into _____________.

frame

95. To show loops in a system sequence diagram you would use a _____________.

Answer: Aggregation (or composition)

96. _____________________________. is a relationship in which one larger "whole" class contains one or more smaller "parts" classes.

polymorphism

97. If an object class called Supplier has a behavior called sendEmail and an object class called Customer has a behavior called sendEmial, that is an example of ___________________.

requirements

98. The version of the use case created during requirements analysis is called a(n) ______________________ use case.

attribute

99. If Supplier was an object class, supplier phone number would be a(n) __________________.

True

33. The UML version 1.0 was released in 1997.

True

34. An activity diagram can be used to model logic with the system.

True

35. A student object class might have a behavior called withdraw From University.

Answer: True Rationale: That would be a behavior, not an attribute.

36. A student object class might have am attribute called withdraw From University.

True

37. Multiplicity is the minimum and maximum number of occurrences of one object class for a single occurrence of the related object class.

False Rationale: Composition is a stronger form of aggregation.

38. Aggregation is a stronger form of composition.

False Rationale: It would a composition relationship.

39. In an e-commerce information system the relationship of a shopping cart object class to a shopping cart item object class would be a generalization/specialization.

False Rationale: This describes an object, not an attribute.

4. An attribute is something that is or is capable of being seen, touched or otherwise sensed, and about which users store data and associate behavior.