Identify Ways to Optimize API Usage Through HTTP Cache Controls 350-901 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A client has a cached copy of a resource with an ETag value of "v2". The client wants to check if the resource has changed without downloading the full representation if it hasn't. Which HTTP request header should the client send?

   • AAccept: application/json
   • BIf-None-Match: "v2"
   • CCache-Control: only-if-cached
   • DIf-Modified-Since: v2
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   An API returns a user's personalized dashboard data that includes sensitive financial information. The response should be cached only in the user's own browser, not in any shared proxy or CDN. Which Cache-Control directive should the API set?

   • ACache-Control: no-cache
   • BCache-Control: private, max-age=300
   • CCache-Control: public, max-age=300
   • DCache-Control: no-store
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A web application loads a JavaScript bundle from a CDN. The bundle is cached with a long max-age. When the development team releases a new version of the bundle, they want to ensure all users receive the new file immediately. What is the most reliable way to achieve this?

   • AUse a shorter max-age for the new version
   • BSend a Cache-Control: no-cache header for the new version
   • CChange the file name to include a version hash (e.g., app-abc123.js)
   • DAsk users to clear their browser cache
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5. 9expert · medium

   A company's API serves a static resource that is cached with Cache-Control: public, max-age=31536000 (1 year). They need to update the resource immediately for all users. Which approach is most reliable?

   • AChange the URL to a new version (e.g., /resource/v2)
   • BWait for the max-age to expire
   • CUse a shorter max-age for the new version
   • DSend a Cache-Control: no-cache header for the new version
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   An API returns a user's shopping cart contents. The cart is user-specific and changes frequently as the user adds or removes items. The API team wants to prevent any caching of this data. Which Cache-Control directive should they use?

   • ACache-Control: no-store
   • BCache-Control: private, max-age=60
   • CCache-Control: no-cache
   • DCache-Control: public, max-age=0
   Reveal Solution Discussion Select an answer first