Best Practices and Performance B2C-COMMERCE-DEVELOPER Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which practice supports scalability in B2C Commerce?

   • AUsing asynchronous processing for long-running tasks
   • BStoring all data in memory
   • CUsing a single server for all processing
   • DPerforming all tasks synchronously
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A developer is reviewing a script that processes a large catalog export. The script loads all products into memory using ProductMgr.queryAll(), then iterates and writes each product to a file. During a recent run, the instance ran out of memory. Which best practice violation is most likely the cause?

   • ALoading all products into memory at once instead of using a cursor or pagination.
   • BUsing a synchronous file write operation inside the loop.
   • CFailing to close the file handle after the loop completes.
   • DNot using a transaction around the file write operations.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A developer is reviewing a script that runs on a schedule to clean up old sessions. The script uses `dw.system.SessionMgr` to iterate over all sessions and delete those older than 30 days. The script is slow and consumes significant memory. Which best practice violation is most likely the cause?

   • AUsing a synchronous script instead of an asynchronous job.
   • BLoading all sessions into memory at once before deleting.
   • CUsing `SessionMgr` to iterate over all sessions.
   • DDeleting sessions one by one in a loop.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   Which approach minimizes the number of API calls in B2C Commerce?

   • ACalling the API multiple times with different parameters
   • BBatching multiple requests into a single call
   • CMaking separate calls for each data item
   • DUsing a loop to call the API for each item
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   A developer has a controller that makes multiple calls to the same service with different parameters. Which refactoring best aligns with B2C Commerce best practices?

   • ACombine the calls into a single batch request if the service supports it
   • BIncrease the timeout for each service call
   • CAdd more logging around each call
   • DMove the calls to a new controller
   Reveal Solution Discussion Select an answer first