You have a storage bucket that contains the following objects: - folder-a/image-a-1.jpg - folder-a/image-a-2.jpg - folder-b/image-b-1.jpg - folder-b/image-b-2.jpg Cloud CDN is enabled on the storage…

Question

Options

• AAdd an appropriate lifecycle rule on the storage bucket.
• BIssue a cache invalidation command with pattern /folder-a/*.
• CMake sure that all the objects with prefix folder-a are not shared publicly.
• DDisable Cloud CDN on the storage bucket. Wait 90 seconds. Re-enable Cloud CDN on the

• A
  3% (2)
• B
  80% (47)
• C
  7% (4)
• D
  10% (6)

Explanation

Cloud CDN supports cache invalidation with wildcard patterns. Issuing a single invalidation command with the pattern /folder-a/* removes all cached objects whose URL paths start with /folder-a/, covering both folder-a/image-a-1.jpg and folder-a/image-a-2.jpg in one operation - the minimum number of commands. Option A (lifecycle rules) manages object expiration and deletion from Cloud Storage, not CDN cache entries. Option C (removing public access) may prevent future caching but does not purge already-cached content from CDN edge nodes. Option D (disabling and re-enabling Cloud CDN) is disruptive to all cached objects and users, not targeted to a prefix, and is far from the minimum-effort approach.

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