You are employed as a requirements engineer in a company that develops control software for electric motors. During your work it becomes increasingly evident that the developers are very well aware of the necessary requirements, even though the requirements are not documented in their entirety. Nevertheless, you decide to document requirements systematically. Which two of the following arguments justifies this step? (2 Points)

Documenting requirements systematically is important, because...

A. ... implementation without documented requirements is not possible.

B. ... non-documented requirements are difficult to negotiate between the stakeholders.

C. ... the coverage of the requirements by means of test cases cannot be checked.

D. ... documented requirements are also good requirements.

In requirements engineering, the use of model-based documentation is very helpful. Behaviour, functions and the structures of the entity being considered can be represented with diagrams. Which two of the following diagrams help to represent the structural perspective of the requirements model? (1 Point)

A. Entity-relationship diagram

B. State diagram

C. Deployment diagram

D. Class diagram

E. Data diagram

One task of the requirements engineer is negotiation of requirements. At this point, conflicts between the stakeholders may be discovered. These must then be resolved. In this process, a differentiation is made between various kinds of conflict. Which two of the listed conflicts are least suitable for handling by the requirements engineer? (1 Point)

A. Subject matter conflict

B. Value conflict

C. Architectural conflict

D. Cost conflict

E. Structural conflict

At a technical college, each student is supervised by a lecturer. Some lecturers supervise several students, some none.

Which of the following class diagrams best shows this student-lecturer relationship? (2 Points)

A. Option A

B. Option B

C. Option C

D. Option D

You model invoices and invoice items with a UML class diagram. The total amount of an invoice is calculated by summing up all individual invoice items. This means that an invoice showing 5 article prices contains 5 invoice items. What model element most accurately describes the relationship between invoice and invoice items? (1 Point)

A. Composition

B. Aggregation

C. Generalisation

D. Association