Given a Performance Issue and Sample Code, Determine the Faulty Cache Configuration and Identify the Cause. B2C-COMMERCE-DEVELOPER Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A developer is implementing a cache for a product's rating. The rating is updated by a review system that calls a webhook. The developer wants to ensure that the cached rating is updated immediately after a new review is submitted. What should the developer do?

   • AClear the entire cache when a new review is submitted.
   • BHave the webhook invalidate the cache for the product.
   • CSet a short TTL on the cache.
   • DInclude the product ID in the cache key.
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A developer is troubleshooting a performance issue on a product listing page. The page uses a custom controller that caches the rendered HTML with a cache key that includes the category ID and the current page number. The page is slow for the first request after a category assignment change, but fast afterward. The developer suspects the cache is not being invalidated correctly. Which step should the developer take first to confirm the cause?

   • AReview the code that assigns products to categories to see if it calls `CacheManager.clearCache()`.
   • BIncrease the cache TTL to reduce the number of cache misses.
   • CCheck the cache configuration in Business Manager to see if the TTL is set to a very short value.
   • DAdd logging to the controller to print the cache key and whether a cache hit or miss occurs.
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A developer is debugging a performance issue where a category page is slow for the first request after a catalog import, but fast afterward. The page uses a custom controller that caches the category data with a TTL of 1 hour. The catalog import updates product assignments. What is the most likely cause of the slow first request?

   • AThe cache is not invalidated when the catalog import runs, so the first request after the import is a cache miss.
   • BThe cache is invalidated on catalog import, so the first request after the import is a cache miss and must re-fetch the data.
   • CThe cache key includes the catalog ID, so the cache is invalidated when the catalog changes.
   • DThe cache TTL is too short, causing the cache to expire before the first request.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   In B2C Commerce, which action typically triggers invalidation of a cached product page?

   • AA merchant updates the product's price in Business Manager
   • BA shopper views the product page
   • CThe site's cache expiration is set to 24 hours
   • DA shopper adds the product to the cart
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   In Business Manager, which cache setting determines the maximum amount of time a cached object is considered valid before it is automatically refreshed?

   • ACache key
   • BCache size
   • CCache dependency
   • DCache expiration
   Reveal Solution Discussion Select an answer first