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Which of the following is an example of a non-functional requirement?

medium🧠 Conceptual Q5 of 15
LLD - Design — Library Management System
Which of the following is an example of a non-functional requirement?
AUsers can reset their passwords
BUser can upload profile pictures
CThe system must respond to user requests within 2 seconds
DAdmin can delete user accounts
Step-by-Step Solution
Solution:

  1. Step 1: Define non-functional requirements

    Non-functional requirements describe system qualities like performance, reliability, and usability.

  2. Step 2: Identify which option describes a quality

    The system must respond to user requests within 2 seconds specifies response time, a performance metric, which is non-functional.

  3. Final Answer:

    The system must respond to user requests within 2 seconds -> Option C

  4. Quick Check:

    Non-functional = system quality, not feature [OK]
Quick Trick: Non-functional = system qualities like speed or security [OK]
Common Mistakes:
MISTAKES
  • Confusing features with non-functional requirements
  • Selecting user actions as non-functional

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