Use Case Diagrams

Question 1

Use case

Answer 1

Describes a specific functionality expected from the system under development

Question 2

Actors

Answer 2

Represent roles that interact with the system, either by initiating use cases or providing data for use cases

Question 3

Primary actors

Answer 3

actors that benefit directly from the execution of a use case

Question 4

Secondary actors

Answer 4

actors that do not benefit directly but provide services to the system

Question 5

Active actors

Answer 5

initiate the execution of a use case

Question 6

Passive actors

Answer 6

supports the execution by providing necessary information or services

Question 7

System boundaries

Answer 7

Represented by a rectangle that defines the system’s scope

Question 8

Use cases

Answer 8

Depicted as ovals, representing system functionality

Question 9

Associations

Answer 9

lines connecting actors to use cases, indicating communication

Question 10

Generalisation

Answer 10

When one use case is specialised by another

Question 11

Extend relationship

Answer 11

an extend use case adds optional behaviour to a base use case