Software Design Concepts
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Questions and Answers

Why is it important to apply different levels of abstraction in the design process?

  • To limit the number of components in the system
  • To create a uniform design pattern for all projects
  • To remove errors and increase software efficiency (correct)
  • To ensure that all modules are interconnected

What does modularity in software design primarily refer to?

  • Dividing the system into smaller, manageable parts (correct)
  • Increasing the complexity of the project
  • The ability to hide information within modules
  • Using a single architecture for all components

Which of the following statements best describes refinement in software design?

  • It emphasizes the modular structure of the design
  • It is a process to reconstruct an entire software system
  • It is used to maintain consistency across components
  • It involves removing impurities to improve quality (correct)

What role does architecture play in software design?

<p>It describes the overall structure and interaction of software components (B)</p> Signup and view all the answers

What does information hiding accomplish in software design?

<p>It protects module information from external access (C)</p> Signup and view all the answers

What is the purpose of refactoring in software development?

<p>To improve the internal structure without changing its external behavior (D)</p> Signup and view all the answers

At which level of software design do components interact with each other?

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

What does the term 'pattern' refer to in software design?

<p>A repeated form or design within the architecture (B)</p> Signup and view all the answers

What is primarily produced during the software design phase?

<p>The design document (C)</p> Signup and view all the answers

Which of the following is not an objective of good software design?

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

Which aspect of software design entails making it easy to understand for users?

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

What does abstraction in software design primarily aim to achieve?

<p>Hide irrelevant data (D)</p> Signup and view all the answers

Which concept in software design helps in creating a model of the system or product?

<p>Software design concept (C)</p> Signup and view all the answers

In terms of resources, what should a good software design address?

<p>Time and cost optimization (C)</p> Signup and view all the answers

Which of the following is essential for ensuring maintainability in software design?

<p>Comprehensive documentation (D)</p> Signup and view all the answers

What is designed during the software design phase to facilitate interactions among modules?

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

Flashcards

Software Design

The process of transforming user requirements into a form that helps programmers implement the software.

Design Document

A document created during software design, based on customer requirements (SRS).

Software Design Modules

Separate units of software functionality.

Control Relationships

How different software modules work together (communicate).

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Interface among Modules

The way modules connect and exchange data.

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Data Structures

Methods for organizing data inside a module.

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Software Design Objectives

Key goals for producing a good software design.

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Correctness

A design must accurately implement planned features.

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Efficiency

Design should use resources (time, money) wisely.

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Understandability

Design should be clear and easy for people to follow.

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Completeness

All necessary design components are included.

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Maintainability

Design must be adjustable if changes become necessary.

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Software Design Concept

The overall idea or principle behind the design of the software.

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Abstraction

Simplifying a design by hiding irrelevant complexities and details.

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Abstraction

Removing unnecessary details to focus on key aspects of a software design

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Modularity

Breaking down a large system into smaller, manageable components (modules).

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Modularity Benefit

Reduces complexity, improves maintainability, and reduces development cost of software.

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Architecture

The overall structure and design of a software system, highlighting interactions between components.

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Refinement

Improving the quality and removing errors in a software design.

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Pattern

A recurring design, structure, or solution used repeatedly in software.

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Information Hiding

Keeping internal details of modules private from other modules in a software design.

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Refactoring

Improving a software system's internal structure without changing its external behavior.

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Architectural Design

The top-level design overview of the software system.

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Preliminary/High-Level Design

A deeper design level that follows architectural design but precedes detailed design.

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Detailed Design

The lowest level of design which includes specific implementation details.

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Study Notes

Introduction to Software Design

  • Software design is the process of transforming user requirements into a suitable form for programmers to code and implement.
  • During the design phase, a design document is created based on the SRS (Software Requirements Specification) document.
  • The goal of this phase is to convert the SRS into a design document.

Design Phase Elements

  • Different modules needed
  • Control relationships between modules
  • Interface between modules
  • Data structures used within modules
  • Algorithms needed for module implementation

Software Design Objectives

  • Correctness: The design accurately implements all system functionalities.
  • Efficiency: Optimization of resource use (time and cost).
  • Understandability: Clear, modular design with layered modules.
  • Completeness: The design includes all necessary components (data structures, modules, external interfaces, etc.).
  • Maintainability: The design allows easy modifications in response to customer requests.

Software Design Concepts

  • The idea or principle behind the design process.
  • It describes how to solve the problem for software design, including logic and thought processes.
  • Creates a model for the system or product.
  • Provides structure and support for development.

Software Design Concepts - List

  • Abstraction (Hiding irrelevant data to decrease complexity and improve efficiency.)
  • Modularity (Dividing the system into smaller modules.)
  • Architecture (Structure of the system and components.)
  • Refinement (Improving the system design by eliminating impurities.)
  • Pattern (Repeated forms or designs.)
  • Information hiding (Concealing module information from other modules.)
  • Refactoring (Improving system structure without changing behavior.)

Design Considerations

  • Abstraction: Hiding details to reduce complexity and increase efficiency. Multiple abstraction levels needed for the design process.
  • Modularity: System subdivision to decrease complex systems and promote reusable modules. Smaller, manageable components are better.
  • High module cohesion/low coupling: Modules should be highly related and independent/interdependent to each other.

Levels of Software Design

  • Architectural Design: Overall structure of the system ensuring conceptual integrity, depicting the system as components interacting with each other. Defines the proposed solution domain.
  • Preliminary/High-Level Design: Decomposing the problem into modules, defining relationships between them and interfaces. Documented using structure charts and UML.
  • Detailed Design: Examining each module in detail to define data structures and algorithms. Documented in module specification documents.

Software Design Process - Diagram

  • Step-by-step flow from analyzing the problem to reviewing the design, including generating system interface, architecture (and detailed designs), and evaluations. Evaluations occur at multiple steps.

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Description

Explore the essential elements of software design, including the transformation of user requirements into design documents. Learn about the key objectives such as correctness, efficiency, understandability, completeness, and maintainability during the design phase.

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