Chapter 5 SA

Question 1

What is a use case?

Answer 1

A use case is a description of how users will interact with a system to achieve a specific goal.

Question 2

True or False: Use cases are only applicable to software development.

Answer 2

False

Question 3

Fill in the blank: A use case diagram visually represents the __________ and interactions between actors and the system.

Answer 3

use cases

Question 4

What does an actor represent in use case modeling?

Answer 4

An actor represents a role played by a user or another system that interacts with the system being modeled.

Question 5

What are the two main types of actors in use case modeling?

Answer 5

Primary actors and secondary actors.

Question 6

Define ‘primary actor’.

Answer 6

A primary actor is the one that initiates the use case to achieve a goal.

Question 7

Define ‘secondary actor’.

Answer 7

A secondary actor is one that provides a service or information to the primary actor.

Question 8

What is the purpose of a use case diagram?

Answer 8

The purpose of a use case diagram is to provide a visual representation of the interactions between users and the system.

Question 9

In a use case, what is a ‘scenario’?

Answer 9

A scenario is a specific sequence of actions and interactions between actors and the system for a particular use case.

Question 10

What is the difference between a ‘use case’ and a ‘scenario’?

Answer 10

A use case describes a general interaction, while a scenario describes a specific instance of that interaction.

Question 11

True or False: Use cases should describe all possible interactions in great detail.

Answer 11

False

Question 12

What is the purpose of ‘include’ relationships in use cases?

Answer 12

Include relationships are used to factor out common behavior from multiple use cases.

Question 13

What is an ‘extend’ relationship in use case modeling?

Answer 13

An extend relationship allows the behavior of a use case to be extended by another use case.

Question 14

Which UML diagram is primarily used for use case modeling?

Answer 14

Use case diagram.

Question 15

What notation is commonly used to represent actors in use case diagrams?

Answer 15

Stick figures.

Question 16

What notation is used to represent use cases in use case diagrams?

Answer 16

Ovals.

Question 17

What does a ‘system boundary’ represent in a use case diagram?

Answer 17

It represents the scope of the system being modeled.

Question 18

How can use cases improve communication among stakeholders?

Answer 18

They provide a clear and shared understanding of system functionality.

Question 19

True or False: Use cases can only be used in the requirements phase of development.

Answer 19

False

Question 20

What is a ‘functional requirement’ in the context of use cases?

Answer 20

A functional requirement specifies what a system should do, often derived from use cases.

Question 21

What is the main goal of use case modeling?

Answer 21

The main goal is to capture and define the functional requirements of a system.

Question 22

Fill in the blank: Use case modeling helps in identifying __________ and their interactions with the system.

Answer 22

stakeholders

Question 23

What is the importance of ‘preconditions’ in a use case?

Answer 23

Preconditions are conditions that must be true before a use case can be executed.

Question 24

What are ‘postconditions’ in a use case?

Answer 24

Postconditions are conditions that must be true after the use case has been executed.

Question 25

What is a 'basic flow' in a use case?

Answer 25

The basic flow describes the standard sequence of steps taken to achieve a successful outcome.

Question 26

What is an 'alternative flow' in a use case?

Answer 26

An alternative flow describes variations in the flow that can occur due to different conditions.

Question 27

True or False: Use cases should only focus on positive scenarios.

Answer 27

False

Question 28

What is the role of 'actors' in defining use cases?

Answer 28

Actors help identify the requirements and functionalities needed from the system.

Question 29

What is a 'use case specification'?

Answer 29

A use case specification provides detailed information about a use case, including flows, preconditions, and postconditions.

Question 30

What is the difference between 'functional' and 'non-functional' requirements?

Answer 30

Functional requirements define what the system should do, while non-functional requirements define how the system should behave.

Question 31

What does the term 'scope' refer to in use case modeling?

Answer 31

Scope refers to the boundaries of the system and what it will include or exclude.

Question 32

What is the importance of 'validating' use cases?

Answer 32

Validating use cases ensures that they accurately capture user needs and system functionality.

Question 33

True or False: Use case diagrams can show the internal workings of a system.

Answer 33

False

Question 34

What are 'stakeholders' in the context of use case modeling?

Answer 34

Stakeholders are individuals or groups with an interest in the outcome of the system.

Question 35

What is the purpose of 'requirements elicitation' in use case modeling?

Answer 35

Requirements elicitation aims to gather and define the needs and expectations of stakeholders.

Question 36

What is the significance of 'user stories' in relation to use cases?

Answer 36

User stories provide a simpler, agile alternative to use cases, focusing on user needs and outcomes.

Question 37

What is a 'goal' in the context of a use case?

Answer 37

A goal is the desired outcome that the primary actor seeks to achieve through the use case.

Question 38

Fill in the blank: __________ can be used to prioritize use cases based on their importance to stakeholders.

Answer 38

Requirements prioritization

Question 39

What is a 'use case model'?

Answer 39

A use case model is a collection of use cases that represent the functionalities of a system.

Question 40

How are use cases typically documented?

Answer 40

Use cases are typically documented in a structured format that includes title, actors, preconditions, flows, and postconditions.

Question 41

True or False: A single use case can have multiple scenarios.

Answer 41

True

Question 42

What is the role of 'feedback' in use case modeling?

Answer 42

Feedback helps refine use cases and ensures they meet user needs and system requirements.

Question 43

What is the value of 'traceability' in use case modeling?

Answer 43

Traceability ensures that requirements can be tracked throughout the development process.