Best Practices and Performance B2C-COMMERCE-DEVELOPER Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   A developer finds a script that queries the product catalog inside a loop. Which modification best conforms to B2C Commerce best practices?

   • AWrap the loop in a try-catch block
   • BAdd a sleep between each query
   • CUse a different query each time
   • DMove the query outside the loop and reuse the result
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A developer is refactoring a service that currently processes a list of 10,000 customer IDs to update their loyalty points. The current implementation uses a for loop and calls a synchronous update function for each customer. The process takes 30 minutes and often times out. Which refactoring approach best aligns with scalability best practices?

   • ASplit the work into smaller batches and process them asynchronously using a queue.
   • BOptimize the update function by removing unnecessary logging.
   • CUse a single database transaction to update all customers at once.
   • DIncrease the timeout of the job to allow the loop to complete.
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A developer is optimizing a storefront that displays a list of products with their ratings. The ratings are stored in a custom object and are updated frequently. The current implementation queries the custom object for each product individually, resulting in 100 queries per page. Which optimization technique would most effectively reduce the number of queries while keeping the ratings reasonably fresh?

   • AUse a client-side AJAX call to fetch ratings after the page loads.
   • BStore the ratings in a product attribute instead of a custom object.
   • CCache the ratings in a site-wide cache with a TTL of 1 hour.
   • DQuery all ratings for the products on the page in a single custom object query.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   Which technique is a recognized performance optimization for B2C Commerce?

   • AIncreasing the number of API calls
   • BCaching frequently accessed data
   • CUsing synchronous processing for all tasks
   • DStoring all data in custom objects
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   A developer is reviewing a controller that handles a form submission. The controller performs the following operations in sequence: validates the form data, saves the data to a custom object, sends a confirmation email, and then redirects the user. Under heavy load, the email service is slow and causes the request to time out. Which best practice violation is most evident?

   • AValidating the form data in the controller instead of a service.
   • BPerforming the email send synchronously in the controller.
   • CSaving the data to a custom object before sending the email.
   • DRedirecting the user after the email is sent.
   Reveal Solution Discussion Select an answer first