Chapter 4 Software Engineering questions with correct
answers
What are functional requirements ? CORRECT ANSWER Statements of services the system
should provide, how the system should react to particular inputs, and how the system should
behave in particular situations. In some cases, the functional requirements may also explicitly
state what the system should not do.
What are non-functional requirements ? CORRECT ANSWER These are constraints on the
services or functions offered by the system. They include timing constraints, constraints o the
development process, and constraints imposed by standards. Non-functional requirements often
apply to the system as a whole, rather than individual system functions or services.
What is a software requirements document ? CORRECT ANSWER The official statement of
what is required of the system developers. Should include both a definition of user requirements
and a specification of system requirements.
It is NOT a design document. As far as possible, it should state WHAT the system should do
rather than HOW it should do it.
What is the distinction between the terms 'shall' and 'should' in a user requirements document,
which is written in a natural language ? CORRECT ANSWER 'Shall' normally indicates a
mandatory requirement. 'Should' indicates a desirable but not essential requirement.
What are the main advantages of using a standard format to specify requirements ? CORRECT
ANSWER All requirements have the same format so are easier to read. The definition of form
fields meant that writers are less likely to forget to include information. Some automated
processing is possible.
What are the principal stages of the requirements engineering process ? CORRECT ANSWER a.
Requirements elicitation.
b. Requirements analysis.
c. Requirements validation.
