Which of the following statements correctly distinguishes functional from non-functional requirements?

easy📝 Conceptual Q3 of 15

Software Engineering - Requirements Engineering

AFunctional requirements describe system behavior; non-functional requirements describe system constraints

BFunctional requirements are optional; non-functional are mandatory

CFunctional requirements focus on hardware; non-functional on software

DFunctional requirements are about user interface only

Step-by-Step Solution

Solution:

Step 1: Define both requirement types
Functional requirements specify what the system does; non-functional specify constraints or qualities.
Step 2: Evaluate options
Functional requirements describe system behavior; non-functional requirements describe system constraints correctly states this distinction. Others are incorrect or misleading.
Final Answer:
A -> Option A
Quick Check:
Functional = behavior; Non-functional = constraints [OK]

Quick Trick: Functional = behavior; Non-functional = constraints [OK]

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