John works as a security engineer for BlueWell Inc. He wants to identify the different functions that the system will need to perform to meet the documented missionbusiness needs. Which of the followi

Question

Options

• AModes of operation
• BPerformance requirement
• CFunctional requirement
• DTechnical performance measures

• A
  4% (1)
• B
  4% (1)
• C
  92% (22)

Explanation

Functional requirement (C) is correct because this process specifically identifies what a system must do - the functions and capabilities needed to fulfill mission/business needs. When John catalogs the operations the system must perform, he is defining functional requirements.

• A (Modes of operation) describes the different states or conditions under which a system operates (e.g., normal, degraded, maintenance), not what functions it must perform.
• B (Performance requirement) defines how well a function must be performed (speed, capacity, availability), not which functions are needed.
• D (Technical performance measures) are metrics used to track whether a system is meeting its design goals during development - an evaluation tool, not a requirements-gathering process.

Memory tip: Think "Functional = Functions." If the task is listing what the system does, it's a functional requirement. Performance and technical measures answer "how well" and "are we on track," not "what must it do."

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