Advanced Domain Model Quiz
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Questions and Answers

Inheritance is used to:

  • Optimize database performance.
  • Ensure unique data entry for each entity.
  • Create non-relational data structures.
  • Share behavior and structure across specialized entities. (correct)

    • What is the result of generalizing the Player entity by the Person entity?

  • One combined table.
  • A shared ID across all tables.
  • A merged entity with combined attributes.
  • Two tables, one per entity. (correct)

    • What will happen to the IDs after generalizing the Player and Staff entities by the Person entity?

  • IDs will be restructured and reassigned.
  • IDs will be duplicated across tables.
  • IDs will be combined into a new sequence.
  • Player and Staff IDs will keep their own sets and sequences. (correct)

    • Which statement is correct?

    <p>A 1-1 association is a HAS relation, and inheritance is an IS type relation.</p> Signup and view all the answers

    Why is it a best practice to create a specialization of the FileDocument and Image entities?

    <p>To better configure security and properties based on purpose.</p> Signup and view all the answers

    What is the default value of the attribute DeleteAfterDownload?

    <p>False.</p> Signup and view all the answers

    Where are files or images stored by default?

    <p>On the file server located on the application server.</p> Signup and view all the answers

    When is it better to place indexes?

    <p>If there are more read than write actions.</p> Signup and view all the answers

    What happens when you apply an index?

    <p>The speed of read actions will increase.</p> Signup and view all the answers

    What is the result of the association in the image below?

    <p>A list of IDs in the Staff object.</p> Signup and view all the answers

    What type of domain model changes can impact the data in the database?

    <p>Type changes and structural changes.</p> Signup and view all the answers

    What are the four stages of data conversion?

    <p>Clean up model, Model the conversion, Deploy and convert, Extend domain model.</p> Signup and view all the answers

    Why is it a best practice to redeploy your app after cleaning up the model?

    <p>To avoid complex sync behavior during the next deployment.</p> Signup and view all the answers

    What does the function reversed() do in XPath?

    <p>It changes the direction in which the association is queried.</p> Signup and view all the answers

    What is the best naming for a self-reference where the buddy is referenced by an apprentice?

    <p>Apprentice_Buddy.</p> Signup and view all the answers

    When localize is set to No, the date displayed in the client is based on:

    <p>UTC value.</p> Signup and view all the answers

    Localizing a DateTime attribute affects:

    <p>Both client and application server.</p> Signup and view all the answers

    If both the App and User time zones are set, the value of the localized DateTime attribute displayed in the client depends on:

    <p>The client time zone.</p> Signup and view all the answers

    Study Notes

    Advanced Domain Model Skills

    • Inheritance enables sharing of behavior and structure across specialized entities.
    • Generalizing the Player entity by the Person entity results in two separate tables.
    • After generalizing Player and Staff entities by Person, their IDs remain unique to each table.
    • A 1-1 association represents a HAS relation, while inheritance indicates an IS relation.
    • Specializing FileDocument and Image entities improves security and properties based on specific usage.

    Working with Data

    • The default value for the DeleteAfterDownload attribute is false.
    • Files or images are typically stored on the file server located on the application server.
    • Indexes are most beneficial when there are more read than write actions.
    • Applying an index increases the speed of read actions.
    • Associations yield a list of IDs in the related object, as illustrated in provided images.

    Advanced Security Configuration

    • Structural changes and type changes in the domain model can affect database data.
    • Data conversion involves four stages: clean model, model the conversion, deploy and convert, extend domain model.
    • Redeploying the application after model cleanup prevents complex synchronization behaviors during later deployments.
    • In XPath, the reversed() function changes the direction in which associations are queried.
    • For self-references, the naming format "Apprentice_Buddy" is preferred for clarity.

    Localization and Time Zones

    • When localization is disabled, the displayed date in the client is based on UTC values.
    • Localizing a DateTime attribute impacts both the client and application server.
    • If both App and User time zones are defined, the client's display of localized DateTime depends on the client time zone.

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    Related Documents

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    Description

    Test your knowledge on advanced domain modeling skills, focusing on concepts such as inheritance and generalization of entities. This quiz will challenge your understanding of how to effectively structure data in a domain model.

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