Given a Performance Issue and Sample Code, Determine the Faulty Cache Configuration and Identify the Cause. B2C-COMMERCE-DEVELOPER Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   In a B2C Commerce template, a developer adds a cache dependency on a product's `custom` attribute. What is the purpose of this dependency?

   • ATo ensure the template is re-rendered when the product's custom attribute changes
   • BTo speed up rendering by skipping the custom attribute lookup
   • CTo prevent the custom attribute from being cached
   • DTo share the cached template across all products
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A developer is implementing a cache for a product price. The price can change when a promotion is applied or removed. The developer wants to ensure that the cached price is invalidated when a promotion changes. Which approach should the developer use?

   • AClear the entire cache when a promotion changes.
   • BAdd a cache dependency on the promotion.
   • CInclude the promotion ID in the cache key.
   • DSet a short TTL on the price cache.
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A B2C Commerce site experiences high server load on a product detail page. The page uses a custom controller that caches the product data with a TTL of 5 minutes. The site receives a large number of requests for the same product. What is the most effective way to reduce the server load?

   • AUse a cache key that includes the shopper's session ID.
   • BDisable caching for the product detail page.
   • CIncrease the cache TTL to 30 minutes.
   • DRemove the cache dependency on the product ID.
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A B2C Commerce site uses a custom controller to display a list of featured products. The controller caches the list using `CacheManager.getCache('featured')` with a cache key that includes the site ID and the current locale. After a merchandiser updates the featured products in Business Manager, the site still shows the old list for several hours. What is the most likely cause?

   • AThe cache is not invalidated when the featured products assignment changes.
   • BThe cache key does not include the catalog ID, so the list is shared across catalogs.
   • CThe cache TTL is set to zero, causing the list to be re-fetched on every request.
   • DThe cache key uses the session ID, so each shopper gets a separate cached copy.
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   A developer is reviewing code that caches a list of available payment methods. The cache key is `'paymentMethods_' + session.custom.paymentMethodVersion`. The version is incremented in Business Manager when a payment method is added or removed. A merchandiser reports that after adding a new payment method, the site still shows the old list. What is the most likely cause?

   • AThe cache key is not using the site ID, so the list is shared across sites.
   • BThe cache is using a local cache, so each application server has its own copy.
   • CThe cache TTL is too short, causing the list to be re-fetched too often.
   • DThe version is not being incremented when the payment method is added.
   Reveal Solution Discussion Select an answer first