Deck 7: Modeling System Requirements With Use Cases

Question 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

True

Question 2

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

Answer 2

False

Question 3

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

Answer 3

True

Question 4

A use case diagram graphically depicts the interactions between the system and external systems and users.

Question 5

A use case narrative is a textual description of the business event and describes how the user will interact with the system to accomplish the task.

Question 6

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

Question 7

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

Question 8

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

Question 9

There are primarily four types of actors.

Question 10

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

Question 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.

Question 12

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

Question 13

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

Question 14

When performing requirements use case modeling, the first step is to identify the business actors.

Question 15

During requirements analysis analysts strive to identify all use cases of the proposed system.

Question 16

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

Question 17

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

Question 18

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

Question 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.

Question 20

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

Question 21

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

Question 22

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

Question 23

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

Question 24

Inheritance is used when two or more actors share common behavior.

Question 25

In a college course website system if both the instructor and students can submit comments to a discussion thread, a use case diagram might model that with inheritance.

Question 26

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

Question 27

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

Question 28

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

Question 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.

Question 30

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

Question 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?

Question 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

Question 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

Question 34

Which of the following is NOT a factor used in the use case ranking and priority matrix

A) significant impact on the architectural design
B) estimated time to implement
C) involves risky technology
D) potential to decrease costs
E) contains significant functionality

Question 35

Which of the following is a benefit of constructing a use case dependency diagram?

A) a graphical depiction of the system's events and their states enhances the understanding of system functionality
B) it aids the project manager determine which use cases are easy to implement.
C) it may help identify missing use cases.
D) both A and C above
E) both A and B above

Question 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

Question 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

Question 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

Question 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

Question 40

Which of the following is NOT a source mentioned in the textbook for finding potential actors?

A) context diagram
B) entity relationship diagram
C) user manuals for the existing system
D) minutes of project meetings
E) the statement of work

Question 41

Which of the following would be the best use case name?

A) enroll in course
B) course enrollment
C) course
D) enrollCourse()
E) they are all good use case names

Question 42

Which of the following is NOT true concerning use case modeling?

A) has its roots in process modeling
B) is an approach that facilitates user-centered development
C) provides a starting point for the identification of data objects or entities
D) is a tool for requirements traceability
E) none of these

Question 43

Which of the following best describes use cases?

A) they are the results of decomposing the scope of system functionality
B) they are represented graphically by a horizontal ellipse
C) each use case represents a single goal of the system
D) they describe user interactions with the system
E) all of these

Question 44

Which of the following would not be an example of an actor?

A) heat sensor
B) time
C) the system itself
D) an organization
E) an individual

Question 45

Which of the following actors primarily benefits from the execution of the use case?

A) primary business actor
B) primary system actor
C) external server actor
D) external receiver actor
E) none of these

Question 46

Which of the following actors responds to a request from the use case (system)?

A) primary business actor
B) primary system actor
C) external server actor
D) external receiver actor
E) none of these

Question 47

Which use case relationship is used to model the relationship between an abstract use case and the original use case?

A) association
B) extends
C) uses
D) depends on
E) inheritance

Question 48

Which use case relationship is used to model the relationship between a use case and an actor?

A) association
B) extends
C) uses
D) depends on
E) inheritance

Question 49

Which use case relationship is used to model the dependencies among use cases?

A) association
B) extends
C) uses
D) depends on
E) inheritance

Question 50

Which of the following is not a step in the process of requirements use case modeling?

A) identify business actors
B) identify business use cases
C) construct use case model diagram
D) document business requirements use case narratives
E) none of these - they are all steps of the process

Question 51

Which of the following references is an excellent source to find potential actors?

A) an organization chart
B) a context diagram
C) existing system documentation
D) both B and C above
E) both A and B above

Question 52

A constraint on the state of the system after the use case has been successfully executed is called a(n):

A) precondition
B) trigger
C) post condition
D) open issue
E) conclusion

Question 53

A constraint on the state of the system before the use case can be executed is called a(n):

A) precondition
B) trigger
C) post condition
D) open issue
E) conclusion

Question 54

The event that initiates the execute of the use case is called a(n):

A) precondition
B) trigger
C) post condition
D) open issue
E) conclusion

Question 55

A question that needs to be resolved before the use case can be finalized is called a(n):

A) precondition
B) trigger
C) post condition
D) open issue
E) conclusion

Question 56

____________________________________ is a process of system development based on understanding the needs of the stakeholders.

Question 57

_____________________________ 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 58

A ____________________________ is a textual description of the business event and describes how the user will interact with the system to accomplish the task.

Question 59

A _________________________is a behaviorally related sequence of steps (a scenario), both automated and manual for the purpose of completing a single business task.

Question 60

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

Question 61

A temporal event is triggered by _______________________________.

Question 62

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

Question 63

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

Question 64

A(n) __________________________ can be used to document actors.

Question 65

A(n) __________________________ can be used to list or document the use cases identified during requirements analysis.

Question 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.

Question 67

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

Question 68

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

Question 69

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

Question 70

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

Question 71

List four excellent references for finding potential actors.

Question 72

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

Question 73

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

Question 74

List two items a project manager can use to determine the importance of use cases.

Question 75

List the six criteria used by the use case ranking and priority matrix for ranking use cases for importance.