Functional vs Non-Functional Requirements
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Questions and Answers

Which of the following statements is true about functional requirements?

  • They are more abstract and intangible.
  • They focus on the behavior of the system. (correct)
  • They can be tested using test cases.
  • They describe the quality attributes of the system.

    • What is the main purpose of functional requirements?

  • To describe how the system should perform in certain conditions.
  • To focus on the tangible aspects of the system.
  • To specify the quality attributes or constraints of the system.
  • To define the specific functionalities or features of the system. (correct)

    • What do nonfunctional requirements specify?

  • The tangible aspects of the system.
  • The quality attributes or constraints of the system. (correct)
  • The behavior of the system in certain conditions.
  • The specific functionalities of the system.

    • Which type of requirements focus on aspects like performance, usability, security, and reliability?

    <p>Nonfunctional requirements</p> Signup and view all the answers

    How are functional requirements different from nonfunctional requirements in nature?

    <p>Functional requirements are directly related to the system's behavior.</p> Signup and view all the answers

    What is the purpose of functional requirements?

    <p>Functional requirements define the specific functionalities or features that a system must provide.</p> Signup and view all the answers

    What do nonfunctional requirements specify?

    <p>Nonfunctional requirements specify the quality attributes or constraints that the system must meet.</p> Signup and view all the answers

    How are functional requirements different from nonfunctional requirements in nature?

    <p>Functional requirements are specific, tangible, and directly related to the system's behavior, while nonfunctional requirements are more abstract.</p> Signup and view all the answers

    What aspects do nonfunctional requirements focus on?

    <p>Nonfunctional requirements focus on aspects like performance, usability, security, and reliability.</p> Signup and view all the answers

    Can functional requirements be tested using test cases?

    <p>Yes, functional requirements can be tested using test cases.</p> Signup and view all the answers

    Study Notes

    Functional Requirements

    • Define specific behaviors or functions that a system must perform.
    • Serve as a guide to what the system should do, typically including inputs, outputs, and user interactions.
    • Can be directly tested using test cases to ensure the system meets specified functions.

    Purpose of Functional Requirements

    • Establish clear criteria for system functionalities, aiding in design and development.
    • Ensure all stakeholders have a shared understanding of expected software capabilities.

    Nonfunctional Requirements

    • Specify criteria that judge the operation of a system, including quality aspects.
    • Focus on performance, usability, security, reliability, and scalability rather than specific functionalities.

    Aspects of Nonfunctional Requirements

    • Performance: Response times, throughput, and resource consumption under load.
    • Usability: User experience, accessibility, and interaction design.
    • Security: Protection measures against unauthorized access and data breaches.
    • Reliability: Consistency of performance and error handling.

    Differences Between Functional and Nonfunctional Requirements

    • Functional requirements are concerned with "what" the system does; nonfunctional requirements are about "how" the system performs its functions.
    • Functional requirements can be directly validated through test cases; nonfunctional requirements often require indirect evaluation through metrics and usability testing.

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    Description

    Test your knowledge of software engineering with this quiz that focuses on differentiating between functional and non-functional requirements. Learn about the purpose, definition, and key differences between these two types of requirements in software development.

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