Develop X++ Code MB-500 Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   A developer needs to create a reusable function that calculates a discount amount based on a percentage and a base amount. The function should be callable from multiple X++ classes without instantiating an object. Which approach should be used?

   • ACreate an instance method on a new class and instantiate it each time.
   • BCreate a public static method in a new class, e.g., 'DiscountCalculator::Calculate(baseAmount, percent)'.
   • CCreate a global function in the Global class using the 'Global::' prefix.
   • DUse a macro to define the calculation logic.
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2. 27application · medium

   A developer needs to delete all sales order lines for a specific sales order where the quantity is zero. The developer wants to minimize database round-trips and ensure the operation is transactional. Which approach should be used?

   • AUse ttsbegin; delete_from SalesLine where SalesLine.SalesId == salesId && SalesLine.Qty == 0; ttscommit;
   • BUse ttsbegin; while select forUpdate SalesLine where SalesLine.SalesId == salesId && SalesLine.Qty == 0 { SalesLine.delete(); } ttscommit;
   • CUse SalesLine.delete() on a buffer that was selected without a where clause.
   • DUse update_recordset SalesLine set Qty = 0 where SalesId == salesId;
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4. 28application · medium

   A developer is working on a legacy codebase and needs to create a global function that can be called from any X++ code. The developer wants to follow best practices. What should the developer do?

   • AAdd a static method to a new class.
   • BAdd a method to the Global class.
   • CAdd a method to a form.
   • DAdd a method to a table.
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5. 29expert · hard

   A developer is refactoring a long method that contains multiple loops and conditionals. The Best Practice tool reports a high cyclomatic complexity warning. The developer needs to reduce complexity while maintaining functionality. Which action is most effective?

   • AUse a switch statement instead of multiple if-else statements.
   • BSuppress the warning using the Best Practice suppression mechanism.
   • CExtract related logic into separate methods, each with a single responsibility.
   • DCombine multiple loops into a single loop to reduce the number of statements.
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6. 30foundation · easy

   What is the purpose of best practice warnings in X++ development?

   • ATo prevent the code from being compiled
   • BTo enforce a specific coding style that is mandatory for all developers
   • CTo automatically fix all code errors without developer intervention
   • DTo identify potential issues in code that may affect performance, maintainability, or correctness
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