Google Cloud Certified Associate Cloud Engineer Practice 2025 - Free Cloud Engineer Practice Questions and Study Guide

The most appropriate grantees to audit for ensuring that your Cloud Storage buckets are not publicly accessible are the entities associated with "allUsers" and "allAuthenticatedUsers."

"allUsers" includes anyone on the internet, meaning that if this grantee is granted any permissions on your buckets, they can potentially access sensitive data from anywhere without authentication. This would make your data publicly accessible.

On the other hand, "allAuthenticatedUsers" refers to anyone who has a Google account and is authenticated; while this doesn't allow access to the general public, it still poses a risk since any authenticated user could access your sensitive data if they have the appropriate permissions.

Thus, to ensure that your Cloud Storage buckets containing sensitive data are not public, it is critical to review the permissions set for both "allUsers" and "allAuthenticatedUsers," making those the key grantees to focus on during the audit.