Object-Oriented Analysis and Design Quiz

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Questions and Answers

What are the three major phases in the object-oriented software development process?

The three major phases are object-oriented analysis, object-oriented design, and object-oriented implementation.

Describe the focus of object-oriented analysis in software development.

Object-oriented analysis focuses on formulating the problem, identifying user requirements, and building a model based on real-world objects.

What is the difference between system design and object design in the object-oriented design phase?

System design involves creating the complete architecture of the system, while object design focuses on identifying classes and their relationships based on that architecture.

What decisions are made during the object design phase regarding class creation?

<p>During the object design phase, decisions are made whether to create new classes from scratch, use existing classes, or inherit from existing classes.</p>
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How does the object-oriented methodology help in visualizing applications?

<p>The object-oriented methodology visualizes applications by using models that are organized around objects, making complex systems easier to understand.</p>
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What is the primary goal of the System Development Life Cycle (SDLC)?

<p>To develop a high-quality system that meets customer expectations within time and cost evaluations.</p>
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List and describe two phases of the SDLC.

<p>The 'Analysis and Specification' phase involves gathering and validating requirements, while the 'System Design' phase focuses on creating detailed specifications from the SRS document.</p>
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What is the purpose of creating a Software Requirement Specification (SRS) document?

<p>The SRS document specifies software, hardware, functional, and network requirements for the new system.</p>
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What role does a feasibility study play in the SDLC?

<p>A feasibility study defines the problem, assesses project viability, and produces a project schedule.</p>
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Why is testing an important phase in the SDLC?

<p>Testing is crucial for identifying and removing errors in the code before deployment.</p>
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What are the main considerations during the planning phase of the SDLC?

<p>During the planning phase, the problem scope, system objectives, and project feasibility are assessed.</p>
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How does the System Design phase relate to the SRS document?

<p>The System Design phase transforms the SRS document into a logical structure with detailed specifications for implementation.</p>
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What is the first step in writing a problem statement?

<p>Identify the problem.</p>
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Why is it important to describe the ideal environment in a problem statement?

<p>It helps outline what the company hopes to accomplish without the problem.</p>
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What should be included in the current gaps section of a problem statement?

<p>It should describe the existing reality, the problem's causes, and why it is an issue.</p>
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What type of data is important to include when stating the consequences of a problem?

<p>Concrete numbers such as time lost or resources wasted.</p>
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What is the final section of a problem statement intended to address?

<p>It proposes how the company will progress towards reaching its goals.</p>
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What are the three analysis techniques used in object-oriented analysis?

<p>Object modelling, dynamic modelling, and functional modelling.</p>
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What does object modelling focus on in a software system?

<p>It develops the static structure in terms of objects and their relationships.</p>
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How does object modelling categorize objects within a software system?

<p>By grouping them into classes based on shared attributes and operations.</p>
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Why is identifying both attributes and operations critical in object modelling?

<p>It characterizes each class and defines its behavior within the system.</p>
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What is the primary focus of the elaboration phase in a project?

<p>The primary focus of the elaboration phase is to develop and test the core architecture while stabilizing the majority of requirements and mitigating significant risks.</p>
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How long is each iteration recommended to last during the elaboration phase?

<p>Each iteration during the elaboration phase is recommended to last between two and six weeks.</p>
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What does the term 'time boxed' refer to in the context of elaboration iterations?

<p>'Time boxed' refers to the fixed end date of each iteration, which determines how long the team has to complete their work.</p>
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What is meant by the term 'executable architecture' in the elaboration phase?

<p>'Executable architecture' refers to the architectural baseline that consists of production-quality portions of the final system.</p>
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What is a problem statement and its purpose in a project?

<p>A problem statement is a concise description of the problem a project aims to address, outlining the current state, desired future state, and gaps between them.</p>
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What kind of iterations are recommended during the elaboration phase?

<p>Short, time-boxed, risk-driven iterations are recommended during the elaboration phase.</p>
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Why is it important to start programming early in the elaboration phase?

<p>Starting programming early allows teams to address high-risk components and validate the core architecture sooner.</p>
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What role do use cases play during the elaboration phase?

<p>Use cases are written in detail during elaboration to clarify requirements and guide development efforts.</p>
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What is one key distinction between elaboration and traditional design phases?

<p>Unlike traditional design phases, elaboration does not rely on extensive modeling but focuses on producing quality code and designs.</p>
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Flashcards

Object-Oriented Analysis

Formulating the problem, identifying user needs, and creating a model based on real-world objects for the desired system.

Object-Oriented Design

Designing the system architecture and individual objects.

System Design

Designing the overall structure of the system as a collection of interacting subsystems and objects.

Object Design

Creating detailed designs of individual classes, including their attributes and methods.

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Object-Oriented Modelling

Visualizing application components using models centered around objects.

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System Development Life Cycle (SDLC)

A model for developing or changing systems, including policies and procedures for the entire life cycle.

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SDLC Phases

The systematic steps in SDLC: Requirements, Design, Implementation, Testing, Deployment, Operations, and Maintenance.

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Feasibility Study

A study to determine if a project is possible and practical, examining cost, time, feasibility, threats, and constraints.

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Analysis and Specification

Gathering requirement details and defining the system's requirements, like components, functions, and interfaces.

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Object-Oriented Implementation

Translating the design into code using a programming language, creating databases, and confirming hardware needs.

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Implementation

The phase of SDLC where the design is translated into working code, databases, and hardware is set up.

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Testing

Identifying and fixing errors in the developed code using specific techniques.

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Elaboration in Software Development

The initial stage of iterative development where the core architecture, risky elements, and majority of requirements are defined and tested, and major risks are mitigated.

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Elaboration Iterations

Short, time-boxed iterations (2-6 weeks long) focused on implementing the core architecture, clarifying requirements, and addressing high-risk items within the elaboration phase.

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Architectural Baseline

A production-quality subset of the final system, representing a validated and tested core architecture, often called executable architecture.

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Risk-Driven Iterations

Iterations in elaboration that prioritize addressing and mitigating the highest-risk elements of the software project.

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Problem Statement

A concise description of the problem a project aims to solve, including the present state, desired future, and the gap between them.

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Time-Boxed Iterations

Iterations with predefined start and end dates.

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Early Programming Start

Initiating programming activities during elaboration, not waiting until later stages.

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Adapative Design

Design and Implementation that responds to feedback from testing, users, and developers.

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Production-Quality Code

Code developed during the elaboration phase should be suitable for the final product, not prototypes.

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Ideal Environment

The desired state of affairs where the problem no longer exists, outlining the goals and desired outcomes.

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Current Gaps

A detailed description of the current reality, highlighting the problem itself, its causes, and its impact.

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Consequences

Quantified evidence of the impact of the problem, showcasing the cost, time, and resource implications.

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Proposed Solutions

A suggested approach to mitigating or eliminating the problem, outlining how the ideal environment can be reached.

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Object Modelling

A technique used in object-oriented analysis to represent the static structure of a software system using objects, classes, and relationships.

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Object

A fundamental building block of a software system representing a real-world entity with attributes and actions.

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Class

A template or blueprint for creating objects, defining their shared attributes and behaviors.

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Relationship

A connection between objects, outlining how they interact with each other within the system.

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Study Notes

Object-Oriented Analysis and Design (OOAD)

  • OOAD uses models to visualize application components around objects
  • Development stages include analysis, design, and implementation
  • Analysis involves formulating the problem, identifying user requirements, and creating models of how the system should operate
  • Design includes system design and object design: system design focuses on system architecture, object design focuses on objects and their interactions
  • Implementation translates the design into code in a programming language; involves database creation and testing

Development Life Cycle (SDLC)

  • Effective SDLC results in high-quality systems meeting customer expectations and completing within budget and time constraints
  • SDLC uses policies and procedures for system development throughout its lifecycle
  • Includes activities like requirements, design, implementation, testing, deployment, operations and maintenance
  • Phases within the SDLC include initiating, planning, analysis, design, implementation, testing, deployment and maintenance

Problem Statement

  • Describes the problem, desired state, and gaps between the two.
  • Ideal situation, current reality, consequences, and proposal (solutions) should be included.
  • Important to identify the what and why of the problem.
  • Includes quantifiable information like lost time, money, etc.

System Analysis

  • System Analysis determines and identifies system requirements, identifying and defining classes and their relationships.
  • Techniques used include object modeling, dynamic modeling, functional modeling
  • Object modeling focuses on objects and classes and their attributes and relationships
  • Dynamic modeling examines how objects and classes change over time and respond to events
  • Functional modeling depicts operations and data flow within objects and classes

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