CPRE Requirements Modeling & Use Cases

Question 1

In UML use case modeling, what does a '<>' relationship between two use cases indicate?

Accepted Answer

The base use case always incorporates the behavior of the included use case

Answer

The base use case optionally incorporates the behavior of the included use case

Answer

The included use case can extend the base use case under certain conditions

Answer

The two use cases share a common actor

Question 2

Which element in a use case model represents the boundary between the system under specification and its environment?

Accepted Answer

System boundary (subject)

Answer

Actor

Answer

Use case

Answer

Association

Question 3

A use case description includes a 'main success scenario' and 'extensions'. What do extensions represent?

Accepted Answer

Alternative flows that handle exceptions or optional branches

Answer

Additional actors who may trigger the use case

Answer

Non-functional requirements related to the use case

Answer

Pre-conditions that must be met before the use case starts

Question 4

In requirements modeling, what is the primary purpose of an Entity-Relationship Diagram (ERD)?

Accepted Answer

To illustrate the data structures and relationships between data entities

Answer

To model the sequence of interactions between actors and the system

Answer

To define the states and transitions of system objects

Answer

To show the hierarchical decomposition of system functions

Question 5

Which of the following is a valid pre-condition in a use case specification?

Accepted Answer

The user must be logged in and have appropriate permissions before initiating the transaction

Answer

The system shall display a confirmation message after saving

Answer

The use case ends when the user closes the application

Answer

The system processes the request within two seconds

Question 6

In a context diagram (Level-0 DFD), what do the external entities connected to the central process represent?

Accepted Answer

Actors or systems outside the scope that interact with the system

Answer

Internal subsystems of the system under development

Answer

Data stores within the system

Answer

Non-functional requirements for the system

Question 7

What distinguishes a primary actor from a secondary actor in use case modeling?

Accepted Answer

A primary actor initiates the use case to achieve a goal, while a secondary actor provides services to the system

Answer

A primary actor is always human, whereas a secondary actor can be an external system

Answer

A primary actor is more important to the business domain than a secondary actor

Answer

A primary actor appears in the main success scenario only, while a secondary actor appears in extensions