CP317 Software Engineering Week 4-1: Low-Level Design
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What is the primary purpose of low-level design in software engineering?

  • To define the overall structure and components of a software system.
  • To develop test cases for verifying the software's correctness.
  • To analyze the user requirements for the software system.
  • To create a detailed plan for implementing the software's functionality. (correct)

    • Which of the following is NOT a key task in low-level design?

  • Creating detailed design.
  • Developing user interface prototypes. (correct)
  • Evaluating detailed design.
  • Understanding architecture and requirements.

    • Which design principle is crucial for both architectural and detailed design?

  • Encapsulation.
  • Inheritance.
  • Cohesion. (correct)
  • Abstraction.

    • Which UML diagram is used to represent the flow of events and interactions between objects in a system?

    <p>Sequence diagram. (A)</p> Signup and view all the answers

    How does low-level design relate to the waterfall model?

    <p>Low-level design occurs after the requirements gathering phase in the waterfall model. (B)</p> Signup and view all the answers

    Which of the following is NOT a common data structure used in low-level design?

    <p>Virtual machines. (C)</p> Signup and view all the answers

    What is the primary purpose of "interface design" in low-level design?

    <p>Specifying the internal interactions between components of the software system. (A)</p> Signup and view all the answers

    Which of the following is a benefit of using low-level design in software development?

    <p>Improves the maintainability and reusability of the software. (B)</p> Signup and view all the answers

    Which of the following techniques is NOT used within "Interface design (internal)" as described in the content?

    <p>GUI design (D)</p> Signup and view all the answers

    What is the primary purpose of defining a ring buffer within the context of "Interface design (internal)" as described?

    <p>To ensure efficient data transfer between processes by providing a dedicated memory space. (D)</p> Signup and view all the answers

    Which of the following is NOT considered an advantage of concurrency in "Interface design (internal)"?

    <p>Greater security through increased complexity. (C)</p> Signup and view all the answers

    What is the key challenge associated with "Race conditions" in the context of concurrency?

    <p>Difficult to predict the exact execution order of instructions. (B)</p> Signup and view all the answers

    In "Interface design (external)", what is the primary concern when designing communication between devices and users?

    <p>Creating an intuitive and accessible user experience. (B)</p> Signup and view all the answers

    Which of the following is NOT a key component of data communication within "Interface design (external)"?

    <p>User interface design best practices for creating visually appealing screens. (A)</p> Signup and view all the answers

    Which operating system exhibits the highest market share on laptop/desktop devices according to the provided data?

    <p>Windows (C)</p> Signup and view all the answers

    What is the primary focus of "GUI design" as described in the content?

    <p>Creating user-friendly and visually appealing interfaces for end users. (A)</p> Signup and view all the answers

    Which of the following is a key task in detailed design, according to the content?

    <p>Data Structure Design (B)</p> Signup and view all the answers

    What are the two primary types of UML diagrams used for internal component design?

    <p>Component and Class Diagrams (A)</p> Signup and view all the answers

    Which data structure is considered Last-In-First-Out (LIFO)?

    <p>Stack (A)</p> Signup and view all the answers

    What type of review is the most common method for evaluating detailed design?

    <p>Technical Review (A)</p> Signup and view all the answers

    What is the difference between a "Software Design Document" and a "Software Detailed Design"?

    <p>There is no difference between the two terms. (D)</p> Signup and view all the answers

    Which of the following is a component of a typical detailed design document?

    <p>Data Structure Definition (A)</p> Signup and view all the answers

    Why is it important to define data types carefully during detailed design?

    <p>All of the above (D)</p> Signup and view all the answers

    According to the content, what is the recommended approach for evaluating detailed design?

    <p>Have a team of experts review the design document. (D)</p> Signup and view all the answers

    Study Notes

    CP317 Software Engineering - Week 4-1: Low-Level Design (Part 1)

    • Course: CP317 Software Engineering
    • Week: 4-1
    • Topic: Low-level design (detailed design)
    • Instructor: Shaun Gao, Ph.D., P.Eng.
    • Agenda Topics:
      • Review of week 3-2 topics (UML diagrams, race conditions, design principles of decomposition, cohesion, and coupling).
      • Low-level design concept and key tasks.
      • Detailed design creation, including interface design (internal and external), GUI design, internal component design, data design, and documentation.
      • Evaluating detailed design and managing implementation.
      • Summary of low-level design.

    Review of Week 3-2 Topics

    • UML Diagrams: Unified Modeling Language diagrams, including structure diagrams (class diagrams, component diagrams), behavior diagrams (use case diagrams, state transition diagrams, sequence diagrams).
    • Design Principles: Decomposition, cohesion, and coupling are critical for both architecture design and detailed design.
    • Race Conditions: A situation where several processes try to access and modify the same shared resource at the same time, potentially leading to inconsistent results.

    Low-Level Design (Detailed Design)

    • Concept: Detailed design is the process of refining and expanding the software architecture to a level that allows implementation. It provides detailed specifications of internal components, including data structures, algorithms, and processing.
    • Key Tasks:
      • Understanding Architecture and Requirements: Thorough understanding of the system requirements and architecture is crucial for allocating components with the right responsibilities. This includes identifying cohesion and coupling properties within components.
      • Creating Detailed Design: Designing the interface (internal and external), GUI, data design, and internal component structure are key for efficient software implementation.
      • Interface Design (internal): Defines how components interact.
        • Methods: Shared memory, concurrency, message passing, Inter-process communication (IPC).
      • Interface Design (external): How the software interacts with external users, devices, or systems. Ex. GUI design, protocols like TCP/IP or serial (RS-232C), and microcontroller communication.
      • GUI design: Graphical User Interface to provide users with an interactive way to interact with a system.
      • Internal Component Design: Diagram showing internal component structure and behaviour including UML structure diagrams, class diagrams, component diagrams, UML behavior diagrams, use case diagrams, state transition diagrams, and sequence diagrams.
      • Data Design: Defining data structures and types relevant to the software's components and functions.
      • Data Structures: Arrays, stacks (LIFO), queues (FIFO), linked lists(singly and doubly).
      • Documenting Detailed Design: Creating a Software Design Document (SDD) detailing design decisions, specifications, and components.
      • Evaluating Detailed Design: Technical reviews to evaluate design for correctness, completeness, and efficiency using techniques like technical review meetings with time notice, input from technical expert, testing team, requirements validation.
      • Managing Implementation: Includes creating an implementation plan, defining a model, and delegating tasks.

    Specific Design Topics

    • Shared Memory / Concurrency: Techniques for sharing data between multiple parts of a program concurrently, which may cause race conditions.
    • Graphical User Interface (GUI) design: This is one way for Users to interact with a system's software.
    • ASCII: Describes coding for communicating between devices which uses a code table (ASCII table) for unambiguous and well-understood character exchange and representation.

    Software Design Documents (SDD)

    • Table of Contents Example: A typical SDD includes sections like Introduction, Software Architecture, Detailed Design, and Conclusion. Sections like Date of Issue, Scope, Issue organization, Authorship, and References are also important.

    Additional Information

    • .NET & Programming Technologies: .NET is one language used for programming and in different versions (e.g., .NET Core 3) including in different environments like Desktops, Web programming or cross-platform capabilities.
    • Waterfall model: A structured approach to implementing software, following a linear sequential flow.
    • Technical reviews: A procedure for evaluating detailed design through structured review, making sure specifications, implementation design and requirements are correct and complete.

    Announcement

    • Group Formation: 75% of students have formed groups.
    • Test 1: A test covering weeks 1-4 will be held on Feb 3rd, requiring laptop completion.
    • Location: LH3094

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    Software Engineering Week 4 Low Level Design Part 1 PDF

    Description

    This quiz covers the concepts discussed in CP317 Software Engineering for Week 4-1, focusing on low-level design. It includes key tasks for detailed design creation such as interface design, GUI design, and the evaluation of the design. Review the important principles of decomposition, cohesion, and coupling along with relevant UML diagrams.

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