Module 4 - Use Case Diagram

Question 1

Use case specification helps in what way ?

Answer 1

the uc specification helps describe how the system and actors collaberate to achieve the uc goal

Question 2

Purpose of a Use Case Diagram

Answer 2

to display the set of UC that actors and the system of interest perform together

Question 3

use case represents a goal that an actor can achieve by using your _________ of interest

Answer 3

system

Question 4

write the use case name from the perspective of the _____

Answer 4

actor

the use case can souns like an action the actor can take

Question 5

create a use case specification for each ____

Answer 5

use case

the real value is in the UC specification , how actors and the system in

Question 6

Use case is a element of definition .. it defines a type of ________ that can execute multiple times

Answer 6

Behavior

Question 7

Generalizations in Use case diagrams can only exist between

Answer 7

use cases and other use cases

Question 8

reference association in use cases can only exist between use cases and ____

Answer 8

actors

reference associations cannot go between use cases and other use cases

Question 9

include relationship

True or False
included relationships can only be used between UC

Answer 9

True - the included use case at the arrowhead end will exectute somewhere within the use case at the tail end each time it executes

the included use case is a REQUIRED PART of the tailend Use case

Question 10

why is this an incorrect of the include relationship?

Answer 10

violates the intent for a use case diagram , the use case diagram shows the behaviors than an actor can behave … its a black box view of your system .
when the include is used for decomposition this is attempting to show the behaviors in a black box

Question 11

T/F an extend relationship can legally be used between any model elements

Answer 11

False

The extend relationship can only be used between UC and UC

Question 12

T/F

the extending use case at the tail end may execute somewhere within the use case at the arrowhead end each time it executes

Answer 12

True

that means the extend ( tail end ) is optional .. it may execute

Question 13

whats the difference between include and extend relationships in use case diagrams ?

Answer 13

Extended relationship May execute when the supertype is invoked
include relationship the uc will execute when the supertype is invoked

—> use case is include , and use case <—- is extends

Question 14

T/F

How would you interpret this model from the use case point of view ?There can only be one or two operators performing this at a time

Answer 14

False

there can be multplie executions of the use case , there can be ALOT more

Question 15

how many instances can be connected at a time

each execution of the behavior must have 1 employee

Answer 15

in that one execution of the use case , 1 employee can participate in that use case behavior

the use case element represents the defined behavior , but that executio