Chapter 7

Question 1

1. User-centered development is a process in that the needs of the stakeholders are studied and analyzed as well as the reasons why the system should be developed.

Answer 1

Answer: True Page: 245 LOD: Easy

Question 2

2. Use case modeling is the process of modeling a system’s users and the activities they perform.

Answer 2

Answer: False Page: 245 LOD: MediumRationale: Use case modeling is the process of modeling a system’s functions in terms of business events, who initiated the events, and how the system responds to those events.

Question 3

3. Use case modeling was originally conceived by Dr.Ivar Jacobson.

Answer 3

Answer: True Page: 245 LOD: Easy

Question 4

6. To accurately and thoroughly create use cases demands minimal user involvement but a significant investment in the system analyst’s time.

Answer 4

Answer: False Page: 246 LOD: MediumRationale: To accurately and thoroughly create use cases demands a high level of user involvement.

Question 5

7. A use case is a behaviorally related sequence of steps (a scenario) for the purpose of completing a single business task.

Answer 5

Answer: True Page: 246 LOD: Medium

Question 6

8. An actor is anything that needs to interact with the system to exchange information.

Answer 6

Answer: True Page: 247 LOD: Easy

Question 7

9. There are primarily four types of actors.

Answer 7

Answer: True Page: 273 LOD: Easy

Question 8

10. A temporal event is an event triggered by the system itself.

Answer 8

Answer: False Page: 248 LOD: EasyRationale: A temporal event is an event triggered by time.

Question 9

11. An extension use case is a use case that extends the functionality of the original use case and may be invoked many times by other use cases.

Answer 9

Answer: False Page: 248 LOD: MediumRationale: An extension use case is a use case that extends the functionality of the original use case and may be only invoked by the use case it is extending.

Question 10

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

Answer 10

Answer: True Page: 249 LOD: Easy

Question 11

13. Modeling the ‘depends on’ relationship between use cases provides a model that is an excellent tool for planning and scheduling purposes.

Answer 11

Answer: True Page: 249 LOD: Easy

Question 12

16. A business requirements use case captures the interactions with the user in a manner that is free of technology and implementation details.

Answer 12

Answer: True Page: 252 LOD: Medium

Question 13

17. A use case’s alternate courses document the behaviors of the use case if an exception or variation to the typical course occurs.

Answer 13

Answer: True Page: 258 LOD: Easy

Question 14

18. The use case ranking and priority matrix is completed only by the development team.

Answer 14

Answer: False Page: 260-261 LOD: MediumRationale: The use case ranking and priority matrix is completed with input from the stakeholders and the development team.

Question 15

19. When using the use case ranking and priority matrix to determine the importance of use cases, the use cases with the highest scores should be assigned the highest priority.

Answer 15

Answer: True Page: 261 LOD: Easy

Question 16

20. When constructing a use case dependency diagram, it is possible to have use cases which have no dependencies.

Answer 16

Answer: True Page: 261-262 LOD: Easy

Question 17

21. A use case diagram graphically depicts the interactions between system processes and data.

Answer 17

Answer: False Page: 246 LOD: MediumRationale: A use case diagram graphically depicts the interactions between the system and external systems and users.

Question 18

22. Functional decomposition refers to the tendency for the functionality of information systems to degrade over time.

Answer 18

Answer: False Page: 246 LOD: MediumRationale: Functional decomposition is the act of breaking a system apart into its subcomponents.

Question 19

23. Use cases are initially defined during the requirements stages of the life cycle.

Answer 19

Answer: True Page: 246 LOD: Medium

Question 20

26. A business requirements use case captures the interactions with the user with technology and implementation details.

Answer 20

Answer: False Page: 252 LOD: MediumRationale: A business requirements use case captures the interactions with the user in a manner that is free of technology and implementation details.

Question 21

27. A use case diagram shows the same thing as a context diagram.

Answer 21

Answer: False Page: 246, 252 LOD: MediumRationale: A context diagram shows the system as a black box.A use case diagram decomposes that black box into functional subcomponents.

Question 22

28. A use case should be named with a verb phrase specifying the goal of the actor.

Answer 22

Answer: True Page: 253 LOD: Easy

Question 23

29. Using a use case ranking and priority matrix, use cases that have a significant impact on the architectural design would tend to be developed first.

Answer 23

Answer: True Page: 261 LOD: Medium

Question 24

30. Using a use case ranking and priority matrix, use cases that include complex functions would tend to be developed first.

Answer 24

Answer: True Page: 261 LOD: Medium

Question 25

31. When looking for actors, which of the following questions is the best one to ask? A) how often is the system backed up? B) who or what provides inputs to the system? C) who is responsible for the budget of the system? D) who is responsible for training the users? E) who is responsible for reporting to the project stakeholders?

Answer 25

Answer: B Page: 252 LOD: Medium

Question 26

32. Which of the following cannot be found on a use case narrative? A) use case name B) use case type C) primary business actor D) description E) none of these – they can all be found on a use case narrative

Answer 26

Answer: E Page: 257-258 LOD: Medium

Question 27

``` 33. Which of the following can a project manager use to determine the importance of use cases? A) use case dependency diagram B) use case glossary C) use case narrative D) actor glossary E) context diagram ```

Answer 27

Answer: A Page: 261-262 LOD: Easy

Question 28

36. Which of the following is NOT a benefit of use-case modeling? A) provides a baseline for testing the system B) provides a framework for driving the system development project C) provides a baseline for user help systems D) provides an aid in estimating project scope and schedule E) all of these are benefits of use-case modeling

Answer 28

Answer: E Page: 245 LOD: Medium

Question 29

37. A motorist stops at a self-service gas station to fill up her car, paying by credit card at the pump. In this use case, who is the primary system actor? A) the motorist B) the station owner C) the credit card authorization company D) the oil company E) none of these

Answer 29

Answer: A Page: 247 LOD: Medium

Question 30

38. A motorist stops at a self-service gas station to fill up her car, paying by credit card at the pump. In this use case, who is the primary business actor? A) the motorist B) the station owner C) the credit card authorization company D) the oil company E) none of these

Answer 30

Answer: A Page: 247 LOD: Medium

Question 31

39. A motorist stops at a self-service gas station to fill up her car, paying by credit card at the pump. In this use case, who is the external server actor? A) the motorist B) the station owner C) the credit card authorization company D) the oil company E) none of these

Answer 31

Answer: C Page: 247 LOD: Medium

Question 32

60. A(n) ____________ is anything that needs to interact with the system to exchange information.

Answer 32

Answer: Actor Page: 247 LOD: Medium

Question 33

61. A temporal event is triggered by _______________________________.

Answer 33

Answer: time Page: 248 LOD: Medium

Question 34

62. A(n) ________________________ extends the functionality of the original use case and may be only invoked by the use case it is extending.

Answer 34

Answer: extension use case Page: 248 LOD: Medium

Question 35

63. A(n) __________________________ represents a form of 'reuse' and is an excellent tool for reducing redundancy among the use cases.

Answer 35

Answer: abstract use case Page: 249 LOD: Medium

Question 36

66. A use case's _____________________________________ is a step-by-step description starting with the actor initiating the use case until the end of the business event.

Answer 36

Answer: typical course of events Page: 258 LOD: Hard

Question 37

67. According to Fred Brooks, the hardest single part of building a software system is deciding ________________________________.

Answer 37

Answer: what to build Page: 244 LOD: Hard

Question 38

68. A(n) ________________________ actor is the stakeholder that directly interfaces with the system to initiate or trigger the business or system event.

Answer 38

Answer: primary system Page: 247 LOD: Medium

Question 39

69. A(n) ________________________ actor is a stakeholder that responds to a request from the use case.

Answer 39

Answer: external server Page: 247 LOD: Medium

Question 40

70. The relationship between an actor and a use case is called a(n) _____________________.

Answer 40

Answer: association Page: 248 LOD: Medium

Question 41

71.List four excellent references for finding potential actors.

Answer 41

Answer: (1) A context diagram that identifies the scope and boundaries of the system (2) Existing system documentation and user manuals (3) Minutes of project meetings and workshops (4) Existing requirements documents, project charter, or statement of work

Page: 251 LOD: Hard

Question 42

72.List five excellent questions to ask when looking for potential actors.

Answer 42

Answer:(1) Who or what provides inputs to the system? (2) Who or what receives outputs from the system? (3) Are interfaces required to other systems? (4) Are there any events that are automatically triggered at a predetermined time? (5) Who will maintain information in the system?

Page: 251 LOD: Hard

Question 43

73.List five excellent questions to ask when looking for potential use cases.

Answer 43

Answer: (1) What are the main tasks of the actor? (2) What information does the actor need from the system? (3) What information does the actor provide to the system? (4) Does the system need to inform the actor of any changes or events that have occurred? (5) Does the actor need to inform the system of any changes or events that have occurred?

Page: 252 LOD: Hard