CPRE Requirements Modeling & Use Cases 3

Question 1

Which of the following best describes a domain model in requirements engineering?

Accepted Answer

A conceptual model of the problem domain showing key concepts and their relationships

Answer

A domain model is a conceptual, business-level representation of the key entities, concepts, and relationships in the problem domain, independent of system design.

Question 2

In structured requirements modeling using DFDs, what is the purpose of a 'leveling' or 'decomposition' technique?

Accepted Answer

To break a high-level process into progressively more detailed sub-processes

Answer

Leveling decomposes a parent process on a DFD into child diagrams that reveal its internal data flows and sub-processes in greater detail.

Question 3

An actor in a use case model that represents an automated external system (e.g., a payment gateway) is best described as:

Accepted Answer

A secondary actor, because it supports the system but does not initiate the use case goal

Answer

An external automated system that provides services to the system under specification but does not initiate the business goal is classified as a secondary (supporting) actor.

Question 4

Which modeling notation is specifically designed to capture how different system components interact over time through message exchanges?

Accepted Answer

Sequence diagram

Answer

A sequence diagram shows the chronological order of messages exchanged between system components or actors across a time axis (lifelines).

Question 5

When a use case model becomes too complex, IREB recommends which strategy to manage complexity?

Accepted Answer

Factor out common behavior into included use cases and conditional behavior into extending use cases

Answer

IREB guidance recommends using <> to reuse common sub-flows and <> to isolate optional or conditional behavior, keeping individual use cases manageable.

CPRE - Certified Professional for Requirements Engineering Practice Test

CPRE - Certified Professional for Requirements Engineering Practice Test

CPRE Requirements Modeling & Use Cases 3