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Why might Policy Troubleshooter show access GRANTED even if the user cannot perform the action in practice?

hard📝 Conceptual Q10 of 15
GCP - Cloud IAM Advanced
Why might Policy Troubleshooter show access GRANTED even if the user cannot perform the action in practice?
AThe resource is deleted
BThe IAM policy is incorrect
CThe user's access token has expired or lacks proper authentication
DThe billing account is suspended
Step-by-Step Solution
Solution:
  1. Step 1: Understand difference between authorization and authentication

    Policy Troubleshooter checks authorization (permissions), not authentication status.
  2. Step 2: Recognize expired tokens affect actual access

    If the token is expired or invalid, the user cannot act despite granted permissions.
  3. Final Answer:

    The user's access token has expired or lacks proper authentication -> Option C
  4. Quick Check:

    Authorization granted but authentication failed = access blocked [OK]
Quick Trick: Access granted but token expired blocks real access [OK]
Common Mistakes:
  • Assuming IAM policy is always wrong
  • Thinking resource deletion causes granted access
  • Blaming billing for permission issues

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