Questions and Answers
Inheritance is used to:
What is the result of generalizing the Player entity by the Person entity?
What will happen to the IDs after generalizing the Player and Staff entities by the Person entity?
Which statement is correct?
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Why is it a best practice to create a specialization of the FileDocument and Image entities?
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What is the default value of the attribute DeleteAfterDownload?
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Where are files or images stored by default?
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When is it better to place indexes?
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What happens when you apply an index?
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What is the result of the association in the image below?
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What type of domain model changes can impact the data in the database?
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What are the four stages of data conversion?
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Why is it a best practice to redeploy your app after cleaning up the model?
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What does the function reversed() do in XPath?
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What is the best naming for a self-reference where the buddy is referenced by an apprentice?
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When localize is set to No, the date displayed in the client is based on:
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Localizing a DateTime attribute affects:
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If both the App and User time zones are set, the value of the localized DateTime attribute displayed in the client depends on:
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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
DeleteAfterDownloadattribute 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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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.
