Exam Professional Cloud Network Engineer topic 1 question 36 discussion

Correct Answer is (B): You might want to remove an object from the cache prior to its normal expiration time. You can force an object or set of objects to be ignored by the cache by requesting a cache invalidation. Path patterns Each invalidation request specifies a path pattern that identifies the object or set of objects that should be invalidated. The path pattern can be either a specific path, such as /cat.jpg, or an entire directory structure, such as /pictures/*. The following rules apply to path patterns: The path pattern must start with /. It cannot include ? or #. It must not include an * except as the final character following a /. If it ends with /*, the preceding string is a prefix, and all objects whose paths begin with that prefix are invalidated.

This approach allows you to efficiently invalidate the cached content for all objects with the folder-a prefix in Cloud CDN, ensuring that outdated copies are removed with minimal impact. Other options, like lifecycle rules or disabling Cloud CDN, would not directly address the need to invalidate cached content and might lead to unnecessary disruption. Restricting access to objects does not affect cached versions either, making it an ineffective solution for this scenario.

B. Issue a cache invalidation command with pattern /folder-a/*. To remove the cached copies of all the objects with the prefix "folder-a", you can use the Cloud CDN cache invalidation feature. This allows you to invalidate cached content by specifying a path or pattern of paths. In this case, the pattern /folder-a/* would match all objects with the prefix "folder-a".

B. Issue a cache invalidation command with pattern /folder-a/. Explanation: To remove the cached copies of all the objects with the prefix folder-a, you can issue a cache invalidation command with the pattern /folder-a/ using the Cloud CDN API. This will remove all cached copies of any objects that begin with the prefix folder-a. Using a cache invalidation command is the quickest way to remove cached copies of objects, and it is not necessary to disable Cloud CDN or change the sharing settings of the objects. Adding a lifecycle rule on the storage bucket can be used to automatically delete objects after a certain period of time, but it does not directly remove cached copies of objects.

• B. Issue a cache invalidation *** command with pattern /folder-a/*. You can force an object or set of objects to be ignored by the cache by requesting a cache invalidation. 4. Enter the directory path and wildcard (/path/to/file/*). • If you want to invalidate the whole directory for all hostnames, enter only the path and wildcard (for example: /images/*).

B. Issue a cache invalidation command with pattern /folder-a/*.

B is right https://cloud.google.com/cdn/docs/invalidating-cached-content#invalidate_the_whole_directory

The correct answer is B

Correct answer : https://cloud.google.com/cdn/docs/invalidating-cached-content#invalidate_the_whole_directory

Answer is : B

Answer is B: https://cloud.google.com/cdn/docs/invalidating-cached-content#gcloud_1 Invalidate the whole directory gcloud compute url-maps invalidate-cdn-cache LOAD_BALANCER_NAME \ --path "/images/*"

Ans - B

It should be "B", the invalidation method is taught in the coursera course.

Ans is B, https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/Invalidation.html

Ans - B