Week 3: Activity Diagram

Question 1

how are system requirements modeled

Answer 1

activity diagram

Question 2

Can an activity diagram be used independently of use cases

Answer 2

yes, it can model

buinsess level function

system level function

Question 3

what is the main goal of an activity diagram

Answer 3

to model a specific usecase at a more detailed level

Question 4

what is a workflow

Answer 4

the sequence of work steps that complete one business transaction or customer request

Question 5

what does an activity diagram describe?

Answer 5

the various user or system activities

the person or component that completes each activity

the sequential flow of these activities

Question 6

what does an activity diagram allow buesiness people to get a better understanding of

Answer 6

the business enviorment in which a sys will run

Question 7

what does an activity diagram focus on

Answer 7

action sequence of execution and the conditions that trigger or guard those actions

Question 8

what does a fork in an activity diagram show

Answer 8

allows activities to go in parrallel

Question 9

what do branches in an activity diagram show

Answer 9

allow alternative activities given different conditions

Question 10

what does a swimlane in an activity digram do

Answer 10

allows to assign responsibilities

Question 11

what do all activity diagrams have at the beginning and end

Answer 11

inital state

final state

Question 12

what does a join do in an activity diagram

Answer 12

brings those parrallel activiteies back together after the split at the fork

Question 13

what shape are the activitties in an activity diagram

Answer 13

Question 14

what shape are the start point in an activity diagram

Answer 14

Question 15

what shape are the end point in an activity diagram

Answer 15

Question 16

what shape are the branches in an activity diagram

Answer 16

Question 17

what shape are the merges in an activity diagram

Answer 17

Question 18

what shape are the forks in an activity diagram

Answer 18

Question 19

what shape are the joins in an activity diagram

Answer 19

Question 20

should merge be used to sync concurrent flows

Answer 20

no, join should be

Question 21

what does merge node do in regards to incoming and outgoing

Answer 21

Question 22

what does a decision node look like and functionality diff between merge node

Answer 22

same node symbol,

merge node has 1 outgoing edge

decision node has multiple outgoing edges

Question 23

what does a join node do

Answer 23

used to sync incoming concurrent flows

they are to support parallelism in activities

Question 24

3 steps to make activity diagram

Answer 24

identify agents to create appropriate swimlanes

make appropriate ovals for the activites in the workflow

connect activity ovals with arrows to show the workflow

Question 25

In an activity diagram with 4 actors, how many start points are there?

Answer 25

1

Question 26

what symbol is used to represetn an either or situation

Answer 26

a deciison symbol

Question 27

what is used for parallel paths(situations when both paths are taken)

Answer 27

syncronization bars

Question 28

how many transition lines are there connecting the inital state to an action (1 or many)

Answer 28

1

Question 29

can you have multiple final states?

Answer 29

yes, the activity may terminate in a different manner