9- In the waterfall model, it is assumed that all the requirements can be elicited at the beginning of the project.

Select one: True False

12- System requirements can be functional requirements, quality requirements or constraints.

Select one: True False

18- Sequence diagrams in the UML are primarily used to model the interactions between:

a. the actors and the objects in a system and between the objects themselves.

b. the objects themselves only.

c. none of the other choices.

d. the actors and the objects only.

21- The aim of software engineering is to produce software that is

a. Delivered on time

b. Fault-free

c. Satisfies users needs

d. All of the mentioned choices are the aims of software engineering

e. Delivered within budget