Interaction Diagrams Flashcards

1
Q

What are the two types of interaction diagrams

A

activity diagram

sequence diagram

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2
Q

what is the function of interaction diagrams

A

to model the dynamic aspects of the information system

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3
Q

function of an activity diagram

A

presents the workflow of the process

describes how activities are co ordinated

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4
Q

lines connecting activities in an activity diagram are called what

A

transitions

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5
Q

what is a branch in an activity diagram

A

when a transition branches into two or more mutually exclusive transitions

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6
Q

what is a fork in an activity diagram

A

when a transition splits into two or more parallel activities and join again after

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7
Q

what is a swimlane in an interaction diagram

A

determines which activity is responsible for each activity

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8
Q

how are guard expressions shown

A

in side square brackets []

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9
Q

what is a join in an interaction diagram

A

like a fork but two into one

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10
Q

interaction diagrams beginning point is shown how

A

filled in circle

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11
Q

how is a branch shown in interaction diagram

A

hollow diamond, splits from there

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12
Q

how are forks and joins shown in an interaction diagram

A

bold lines

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13
Q

how is the end of an interaction diagram shown

A

black circle surrounded by hollow circle

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14
Q

what is the function of a sequence diagram

A

an interaction diagram that shows how operations are carried out

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15
Q

how are sequence diagrams organised

A

according to time, time progresses as you go down the page

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16
Q

what does a lifeline look like in a sequence diagram

A

vertical dotted line

17
Q

what does the lifeline show

A

the amount of time that the object is in existence

18
Q

if a class no longer exists after the activity, how is the end of the lifeline shown

A

an x

19
Q

each arrow in the sequence diagram is called the

A

message call

20
Q

what does the activation bar show

A

represents the duration of the execution of the message

21
Q

where to put return values in sequence diagrams

A

above the dotted line