Develop Object-Oriented Code MB-500 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A developer needs to retrieve all sales orders where the SalesStatus is 'Invoiced' and the CustAccount is in a list of customer accounts. The query must be built dynamically because the list of customers is provided at runtime. Which approach should the developer use?

   • AUse QueryBuilder to construct the query and add a QueryBuildRange with the value list.
   • BUse a Query object with a static range and add a join to the CustTable.
   • CUse a while select statement with a for loop to filter each customer.
   • DUse a QueryRun with a static query defined in the AOT.
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2. 22foundation · easy

   In X++, what is the purpose of attribute classes?

   • ATo create new instances of a class
   • BTo define the data type of a variable
   • CTo control access to class members
   • DTo add metadata to classes, methods, and fields
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4. 23expert · hard

   A developer is designing a framework that processes different types of documents. Each document type has a `parse` method, but the parsing logic varies. The developer wants to allow third-party developers to add new document types without modifying the framework. Which design best supports this extensibility?

   • ACreate a single `DocumentParser` class with a `switch` statement on document type.
   • BCreate an interface `IDocumentParser` with a `parse` method and use a factory to instantiate the appropriate parser.
   • CCreate an abstract base class `DocumentParser` with a virtual `parse` method that throws an exception.
   • DUse a delegate to define the parse method for each document type.
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5. 24foundation · easy

   In X++, what is the purpose of an event handler class?

   • ATo store data for the application
   • BTo define new events in the system
   • CTo manage user interface layouts
   • DTo contain methods that respond to specific events
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6. 25application · medium

   A developer is implementing a notification system where a `Notifier` class must call a method on a subscriber object when an event occurs. The subscriber method is defined in a class that implements a specific interface. The developer wants to avoid a hard dependency on the subscriber class. Which approach should the developer use?

   • AUse a delegate in the `Notifier` class and have the subscriber subscribe to the delegate.
   • BUse a static method in the `Notifier` class to call the subscriber.
   • CUse an event handler class with a `PostHandler` attribute on the subscriber method.
   • DInstantiate the subscriber class directly in the `Notifier` class and call the method.
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