1Z0-1127-25 Deploying and Managing Generative AI on OCI Practice Question
A user wants to access the OCI Generative AI service programmatically. Which credential method is recommended for use in a production application running on OCI Compute?
⚠ Common exam trap
Oracle often tests the distinction between instance principal (for Compute instances) and resource principal (for serverless or managed services), leading candidates to confuse the two or to incorrectly select API signing keys as the 'most secure' option without considering operational overhead.
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
✓
Instance principal
Instance principal authentication is the recommended method for production applications running on OCI Compute because it allows the application to authenticate with OCI services without managing or embedding any credentials. The OCI Compute instance assumes a dynamic group and IAM policy that grants it permissions, and the SDK automatically handles token exchange via the instance metadata service, eliminating the need for long-lived secrets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
API signing keys
Why it's wrong here
Keys can be compromised if stored in code.
- ✓
Instance principal
Why this is correct
Instance principal dynamically obtains credentials via instance metadata service.
- ✗
User password and OCID
Why it's wrong here
Passwords are not used for API authentication.
- ✗
Resource principal
Why it's wrong here
Resource principal is for OCI resources like Functions, not compute instances.
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