Develop Object-Oriented Code MB-500 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   In X++, a variable declared with the 'static' keyword at class level:

   • AIs created anew for each instance of the class
   • BCan only be used in static methods
   • CIs accessible only within the class methods
   • DIs shared across all instances of the class
   Reveal Solution Discussion Select an answer first
2. 17expert · hard

   A developer is building a dynamic query using `QueryBuilder` to retrieve records from `ProjTable` based on a variable number of project statuses. The user can select zero or more statuses. If no statuses are selected, all projects should be returned. The developer must ensure the query is built correctly. Which approach should the developer use?

   • AAlways add a range with a value of an empty string when no statuses are selected.
   • BBuild the query with a `where` clause that is conditionally concatenated.
   • CAdd a range for the `Status` field only if the list of statuses is not empty.
   • DUse a `QueryBuildRange` with a `value` of '*' when no statuses are selected.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   In X++, what is a delegate?

   • AA method that is automatically called when an object is created
   • BA type that defines a method signature, used to call methods as callbacks
   • CA class that contains only static methods
   • DA variable that stores a value of any data type
   Reveal Solution Discussion Select an answer first
5. 19application · easy

   A developer is writing a class that calculates discounts. Inside a method, a local variable is used to store the intermediate discount amount. The developer wants the variable to be accessible only within that method. Which declaration should be used?

   • ADeclare the variable as a static variable in the class.
   • BDeclare the variable at the class level with private access modifier.
   • CDeclare the variable inside the method without any access modifier.
   • DDeclare the variable in the class declaration with protected access.
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A developer must extend the behavior of the `InventOnHand` class's `getOnHandQuantity` method to add a custom calculation for a specific item group. The change must be isolated to a new model and must not modify the original class. Which approach should the developer use?

   • AModify the `getOnHandQuantity` method directly in the original class and add a customization tag.
   • BCreate a new class that inherits from `InventOnHand` and override the `getOnHandQuantity` method.
   • CUse a Chain of Command (CoC) class to wrap the `getOnHandQuantity` method and add the custom logic.
   • DCreate an event handler for the `getOnHandQuantity` method using the `PostHandler` attribute.
   Reveal Solution Discussion Select an answer first