1Z0-1127-25 Deploying and Managing Generative AI on OCI Practice Question
Network Topology
Refer to the exhibit. A user receives this error when using the OCI CLI to chat with a model. What is the most likely cause?
⚠ Common exam trap
It's easy for candidates to assume the error is due to a misconfiguration (region or model ID) rather than a missing IAM policy, because the CLI error message may not explicitly say 'authorization' and instead show a generic 'service error'.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The user does not have the required IAM policy to invoke the model.
The error occurs because the user lacks the necessary IAM policy to invoke the model. In OCI, even if the model is deployed and the CLI is correctly configured, the IAM policy must grant the user or group the 'inference' permission on the specific model or model family. Without this policy, the OCI CLI returns an authorization error when attempting to chat with the model.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The model is not deployed.
Why it's wrong here
Incorrect: An undeployed model would give an error about model not being active.
- ✗
The model ID is incorrect.
Why it's wrong here
Incorrect: An incorrect model ID would return a 404 or 'model not found' error.
- ✗
The OCI CLI is not configured with the correct region.
Why it's wrong here
Incorrect: Region mismatch would cause a different error (e.g., cross-region access denied).
- ✓
The user does not have the required IAM policy to invoke the model.
Why this is correct
Correct: The 'AuthorizationFailure' error indicates insufficient permissions.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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