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Computer Systems Analyst Mock Interview

Question 3 of 25 for our Computer Systems Analyst Mock Interview

Computer Systems Analyst was updated by on November 17th, 2020. Learn more here.

Question 3 of 25

What are some of the differences between functional and non-functional requirements?

"The functional requirements of a system describe what the system should do. The non-functional requirements address how the system performs or operates. For example, functional requirements can include authentication, transactions, administrative functions, and other system processes. Non-functional requirements may include security, performance levels, scalability of the system, and capacity. Both elements are needed to properly design and provision a computer system."

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How to Answer: What are some of the differences between functional and non-functional requirements?

Advice and answer examples written specifically for a Computer Systems Analyst job interview.

  • 3. What are some of the differences between functional and non-functional requirements?

      How to Answer

      This technical question is asking you to compare two similar but different terms. When comparing to technical items, you should first define them, discuss their differences, and then provide examples of how they are used. This will ensure that you're answering the question completely and addressing the interviewer's inquiry. As always, be prepared for follow-up questions.

      Written by William Swansen on November 17th, 2020

      Answer Example

      "The functional requirements of a system describe what the system should do. The non-functional requirements address how the system performs or operates. For example, functional requirements can include authentication, transactions, administrative functions, and other system processes. Non-functional requirements may include security, performance levels, scalability of the system, and capacity. Both elements are needed to properly design and provision a computer system."

      Written by William Swansen on November 17th, 2020

      Anonymous Interview Answers with Professional Feedback

      Anonymous Answer

      "Functional requirements address the basics needed for a given product or solution to deliver its deliverable. While non-functional requirements address the: usability, reliability, performance, and supportability of the product or solution. An example of a functional requirement is for a car to start and move while a non-functional is for the car to have seat belts or red brake lights."

      Amanda's Feedback

      You're right - functional requirements address what a system does or must not do, while non-functional requirements address how the system does something. Ultimately, non-functional requirements don't affect the primary functionality of a system.

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