Functional and Non-Functional Requirements in System Design
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Questions and Answers

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

  • The system must respond to user input within 2 seconds.
  • The system must allow users to log in with a username and password. (correct)
  • The system must be compatible with multiple browsers.
  • The system must be accessible to users with disabilities.

    • What is the primary purpose of non-functional requirements?

  • To create a narrative description of a feature or requirement.
  • To set boundaries and expectations of a feature or requirement.
  • To define what the system must do to meet user needs.
  • To describe the quality attributes of a system. (correct)

    • What is the typical format of a user story?

  • The system should [perform some task] so that [the user can achieve some goal].
  • As a [user role], I want to [perform some task] so that [I can achieve some goal]. (correct)
  • The user wants to [perform some task] so that [they can achieve some goal].
  • The system must [perform some task] so that [I can achieve some goal].

    • What is the purpose of acceptance criteria?

    <p>To set boundaries and expectations of a feature or requirement.</p> Signup and view all the answers

    Which of the following is an example of an acceptance criterion?

    <p>The system must display a list of all orders placed by the user.</p> Signup and view all the answers

    What is the primary difference between functional and non-functional requirements?

    <p>Functional requirements describe what the system must do, while non-functional requirements describe how the system should perform its functions.</p> Signup and view all the answers

    What is the purpose of user stories in agile development?

    <p>To create a narrative description of a feature or requirement from the user's perspective.</p> Signup and view all the answers

    Which of the following is NOT an example of a functional requirement?

    <p>The system must respond to user input within 2 seconds.</p> Signup and view all the answers

    What is the relationship between user stories and acceptance criteria?

    <p>Acceptance criteria define the boundaries and expectations of a user story.</p> Signup and view all the answers

    What is the purpose of use cases in system development?

    <p>To identify the interactions between the system and its users.</p> Signup and view all the answers

    Study Notes

    Functional Requirements

    • Describe the functional capabilities of a system
    • Define what the system must do to meet user needs
    • Examples:
      • The system must allow users to log in with a username and password.
      • The system must calculate the total cost of items in a shopping cart.

    Non-functional Requirements

    • Describe the quality attributes of a system
    • Define how the system should perform its functions
    • Examples:
      • The system must respond to user input within 2 seconds.
      • The system must be accessible to users with disabilities.

    User Stories

    • A narrative description of a feature or requirement from the user's perspective
    • Typically written in the following format:
      • As a [user role], I want to [perform some task] so that [I can achieve some goal].
    • Examples:
      • As a customer, I want to be able to view my order history so that I can track my purchases.
      • As a manager, I want to be able to generate reports on sales trends so that I can make informed business decisions.

    Acceptance Criteria

    • A set of conditions that must be met in order for a user story or requirement to be considered complete
    • Defines the boundaries and expectations of a feature or requirement
    • Examples:
      • The system must display a list of all orders placed by the user.
      • The system must generate a report that includes sales data for the past quarter.

    Use Cases

    • A description of a system's functional capabilities from the user's perspective
    • Defines the interactions between the user and the system
    • Typically includes:
      • Actor: The user or system that interacts with the system
      • Goal: The user's goal or objective
      • Preconditions: The conditions that must be met before the use case can begin
      • Triggers: The event that initiates the use case
      • Description: The steps involved in the use case
    • Examples:
      • Use Case: Place Order
        • Actor: Customer
        • Goal: To place an order for products
        • Preconditions: The customer has a valid account and is logged in
        • Triggers: The customer clicks the "Place Order" button
        • Description: The system validates the order, processes payment, and updates the customer's order history.

    Functional Requirements

    • Describe the functional capabilities of a system
    • Define what the system must do to meet user needs
    • Examples of functional requirements include:
      • Allowing users to log in with a username and password
      • Calculating the total cost of items in a shopping cart

    Non-functional Requirements

    • Describe the quality attributes of a system
    • Define how the system should perform its functions
    • Examples of non-functional requirements include:
      • Responding to user input within 2 seconds
      • Being accessible to users with disabilities

    User Stories

    • A narrative description of a feature or requirement from the user's perspective
    • Typically written in the format: "As a [user role], I want to [perform some task] so that [I can achieve some goal]"
    • Examples of user stories include:
      • As a customer, I want to view my order history so that I can track my purchases
      • As a manager, I want to generate reports on sales trends so that I can make informed business decisions

    Acceptance Criteria

    • A set of conditions that must be met in order for a user story or requirement to be considered complete
    • Defines the boundaries and expectations of a feature or requirement
    • Examples of acceptance criteria include:
      • Displaying a list of all orders placed by the user
      • Generating a report that includes sales data for the past quarter

    Use Cases

    • A description of a system's functional capabilities from the user's perspective
    • Defines the interactions between the user and the system
    • Typically includes:
      • Actor: The user or system that interacts with the system
      • Goal: The user's goal or objective
      • Preconditions: The conditions that must be met before the use case can begin
      • Triggers: The event that initiates the use case
      • Description: The steps involved in the use case
    • Example of a use case:
      • Use Case: Place Order
        • Actor: Customer
        • Goal: To place an order for products
        • Preconditions: The customer has a valid account and is logged in
        • Triggers: The customer clicks the "Place Order" button
        • Description: The system validates the order, processes payment, and updates the customer's order history

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    Description

    This quiz covers the key concepts of functional and non-functional requirements in system design, including their definitions and examples. Learn how to identify and articulate user needs and system quality attributes.

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