Levels of Data Modeling
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Questions and Answers

What is the purpose of identifying the Critical Path in a project?

  • To highlight tasks that can be delayed without affecting the project timeline
  • To pinpoint the easiest tasks in the project to focus on first
  • To prioritize tasks based on their duration
  • To identify tasks that, if delayed, will delay the entire project (correct)

    • Which factor is NOT mentioned as a potential impact on time delivery in a project?

  • Project size
  • Quality of project deliverables (correct)
  • Complexity of integration
  • Dependency on contractors

    • What characterizes the Predecessor tasks in a project?

  • They always have a longer duration compared to other tasks
  • They are tasks that need to happen after other concurrent tasks
  • They are tasks that need to happen before others and have multiple predecessor options (correct)
  • They are tasks that are not critical for project success

    • What is the purpose of identifying Multiple successor tasks in a project?

    <p>To start with smaller tasks and progress towards larger ones like task 3 and 4</p> Signup and view all the answers

    In Task Boxes for a project, what information is NOT included?

    <p>Contact details of the task assignee</p> Signup and view all the answers

    Which factor is highlighted as impacting time delivery in a project?

    <p>Experience with similar projects</p> Signup and view all the answers

    What is a message in object-oriented programming?

    <p>A command that tells an object to perform a specific method</p> Signup and view all the answers

    In object-oriented programming, what does inheritance establish?

    <p>Common attributes and methods for subclasses</p> Signup and view all the answers

    What is polymorphism in the context of object-oriented programming?

    <p>Objects having different reactions to the same message</p> Signup and view all the answers

    How are associations defined in object-oriented programming?

    <p>Through establishing relationships between classes</p> Signup and view all the answers

    What is the purpose of a superclass in object-oriented programming?

    <p>To hold common attributes and methods shared by subclasses</p> Signup and view all the answers

    How does polymorphism contribute to the flexibility of object-oriented programming?

    <p>By enabling different reactions to the same message</p> Signup and view all the answers

    What is the main focus of a conceptual model?

    <p>Showing high-level abstract relations of concepts</p> Signup and view all the answers

    Which type of model is concerned with specifying concrete storage characteristics and how data is stored?

    <p>Physical model</p> Signup and view all the answers

    What is the primary difference between process models and data models?

    <p>Data models focus on data flow and transformation.</p> Signup and view all the answers

    Which type of model describes the natural structure of data and the relationships among them?

    <p>Data model</p> Signup and view all the answers

    In terms of system development, what does a logical model primarily focus on?

    <p>What the system will do</p> Signup and view all the answers

    Why is it important to document mental models formally according to the text?

    <p>To communicate the model to others</p> Signup and view all the answers

    What is the primary purpose of an analyst's role in strategic planning?

    <p>To define the scope of the project</p> Signup and view all the answers

    How does a strong business case benefit a project?

    <p>It provides justification for a proposal</p> Signup and view all the answers

    Which best describes how to determine if a request presents a strong business case?

    <p>By evaluating if the request supports the strategic plan</p> Signup and view all the answers

    In the business case example provided, what is the main purpose of needing an event sign-up application connected to Authorize.net?

    <p>To collect payments from customers attending the conference</p> Signup and view all the answers

    Why is it important for requests to present a strong business case?

    <p>To ensure alignment with strategic plans and objectives</p> Signup and view all the answers

    Which request is considered better between needing an event sign-up application and adding a new checkbox field to the application table?

    <p>The one concerning an event sign-up application</p> Signup and view all the answers

    What is the main focus of the 4 model approach mentioned in the text?

    <p>Current state and reverse engineering</p> Signup and view all the answers

    In a Data Flow Diagram, what do External Entities represent?

    <p>Data sources and sinks external to the system</p> Signup and view all the answers

    What is the naming convention for a Process in a Data Flow Diagram?

    <p>Uppercase verb</p> Signup and view all the answers

    What is the purpose of a Data Store in the context of a DFD?

    <p>Stores and manages collections of data</p> Signup and view all the answers

    Which level of DFD focuses on the system's interaction with the environment?

    <p>Context level</p> Signup and view all the answers

    What does a Data Flow represent in a Data Flow Diagram?

    <p>Path for data movement in the system</p> Signup and view all the answers

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