Create Classes and Extend AOT Elements MB-500 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A developer needs to add a validation step that runs after a sales order is confirmed, without modifying the standard SalesTableType class. The validation must access the sales order record and must be maintainable in a future upgrade. Which approach should the developer use?

   • ACreate a new class that inherits from SalesTableType and use the class in all forms where sales orders are confirmed.
   • BModify the confirm method in SalesTableType to call a new method in a helper class.
   • CCreate an event handler class with a method decorated with the PostHandlerFor attribute, subscribing to the SalesTableType.confirm event.
   • DCreate a new class that extends SalesTableType and override the confirm method.
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2. 2application · medium

   A company wants to log every time a sales order is posted, but they cannot modify the standard SalesFormLetter class. They need to run custom code after the posting process completes. What should the developer use?

   • AA pre-event handler for the SalesFormLetter.post() method.
   • BA class extension with a new method that is called manually from the UI.
   • CA post-event handler for the SalesFormLetter.post() method.
   • DA new class that overrides the post() method.
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4. 3application · medium

   A developer needs to run validation logic before a standard method executes, but they cannot modify the original class. The validation should be able to cancel the operation. Which approach should be used?

   • AA new method that is called before the original method from the UI.
   • BA post-event handler that throws an exception.
   • CA pre-event handler that sets the CancelEventArgs.Cancel property to true.
   • DA class extension that overrides the method.
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5. 4foundation · easy

   In Dynamics 365 Finance and Operations, which element in the Application Object Tree (AOT) is used to create a new class that contains business logic?

   • ACode > Classes
   • BBusiness Logic > Services
   • CData Model > Tables
   • DUser Interface > Forms
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6. 5application · medium

   A developer needs to modify the behavior of a method in a standard class without changing the original code. The method is not a delegate and does not have any event attributes. Which approach should the developer use?

   • AUse a class extension to override the method.
   • BUse a pre/post event handler on the method.
   • CModify the original class to change the method.
   • DCreate a new class that inherits from the standard class and override the method, then use the new class in all relevant places.
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