The correct answer is to configure a service principal for the cluster to read the bucket. This is required because a dedicated AI cluster in OCI operates as a resource principal—an identity for the cluster itself—rather than using a user’s personal credentials. By assigning a service principal with an IAM policy that grants read access to the specific Object Storage bucket, you enable the fine-tuning job to securely retrieve training data without embedding static keys or exposing the bucket publicly. On the Oracle Cloud Infrastructure Generative AI Professional 1Z0-1127 exam, this scenario tests your understanding of resource-based access control for managed AI workloads, often appearing as a distractor against options like using pre-authenticated requests or user tokens. A common trap is assuming the cluster inherits your user permissions, but it does not; you must explicitly grant the service principal the necessary role. Memory tip: think “cluster as a service account”—if the cluster needs data, give the cluster its own identity and permission.
1Z0-1127 Using OCI Generative AI Service Practice Question
This 1Z0-1127 practice question tests your understanding of using oci generative ai service. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is fine-tuning a Llama model on OCI with dedicated AI cluster. They want to use their own training data stored in Oracle Object Storage. What must they do to ensure the fine-tuning job can access the data?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a service principal for the cluster to read the bucket.
Option D is correct because the dedicated AI cluster needs a service principal (resource principal) with permissions to read the Object Storage bucket. Other options are not valid for controlled access.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Upload the data to the dedicated cluster's local storage.
Why it's wrong here
Dedicated clusters do not have persistent local storage for training data.
✗
Use OCI Data Flow to transfer data.
Why it's wrong here
Data Flow is for data processing, not for providing access to Object Storage.
✓
Configure a service principal for the cluster to read the bucket.
Why this is correct
A service principal grants the cluster permissions to access resources like Object Storage.
Related concept
Standard ACLs match source addresses.
✗
Create a pre-authenticated request for the bucket.
Why it's wrong here
Pre-authenticated requests provide temporary access but are not recommended for automated jobs.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 1Z0-1127 ACL questions on filtering logic and placement.
Using OCI Generative AI Service — This question tests Using OCI Generative AI Service — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Configure a service principal for the cluster to read the bucket. — Option D is correct because the dedicated AI cluster needs a service principal (resource principal) with permissions to read the Object Storage bucket. Other options are not valid for controlled access.
What should I do if I get this 1Z0-1127 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 1Z0-1127 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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