Apply Fundamental Performance Optimization Techniques MB-500 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which X++ construct is used for row-based processing?

   • Adelete_from
   • Bupdate_recordset
   • Cwhile select
   • Dinsert_recordset
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A developer is writing a batch job that processes 50,000 sales orders. The job needs to calculate a total discount for each order and then update a summary table. The current implementation uses a while select loop that reads each order, calculates the discount, and updates the summary table one row at a time. The job takes over an hour to run. What should the developer do to reduce the execution time?

   • AUse a singleton class to hold the summary table buffer and reuse it across iterations of the loop
   • BKeep the while select loop but add a 'where exists' clause to filter the sales orders before processing
   • CCreate a temporary table to store the calculated discounts, then use insert_recordset to update the summary table in one set-based operation
   • DIncrease the query batch size in the while select to 5000 to reduce round trips
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   In Dynamics 365 Finance and Operations, what is the primary purpose of analyzing concurrency?

   • ATo determine the number of records in a table
   • BTo identify bottlenecks caused by multiple users or processes accessing the same data simultaneously
   • CTo optimize the user interface layout
   • DTo check the syntax of X++ code
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   Which X++ construct is commonly used to implement a singleton pattern in Dynamics 365 Finance and Operations?

   • AA public constructor that allows multiple instances
   • BA global variable that holds the instance
   • CA static method that returns a new instance every time it is called
   • DA private constructor and a static method that returns a single instance
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   In X++ development for Dynamics 365 Finance and Operations, what is the primary purpose of implementing the singleton pattern?

   • ATo provide a way to iterate over a collection of objects
   • BTo allow multiple instances of a class to be created concurrently
   • CTo simplify the creation of complex object graphs
   • DTo ensure that only one instance of a class exists in the application, providing a global point of access
   Reveal Solution Discussion Select an answer first