- A
OCI Audit
Why wrong: Audit logs events but does not restrict access.
- B
OCI Vault
Why wrong: Vault is for managing encryption keys and secrets.
- C
Network security groups
Why wrong: NSGs control network-level access, not user-level.
- D
IAM policies
IAM policies define who can perform actions on resources.
Question 221 of 991
1Z0-1127 Fundamentals of Large Language Models Practice Question
This 1Z0-1127 practice question tests your understanding of fundamentals of large language models. 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.
An OCI administrator wants to limit which users can invoke a specific LLM endpoint. Which resource type should be used?
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
✓
IAM policies
IAM policies are the correct resource type because they define authorization rules that control which users, groups, or service principals can invoke specific OCI APIs, including the LLM inference endpoint. By writing a policy with a verb like 'inspect' or 'use' on the resource type 'ai-service-language-family' or a specific model family, the administrator can grant or deny access to the LLM endpoint. This is the standard OCI mechanism for fine-grained access control to AI services.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
OCI Audit
Why it's wrong here
Audit logs events but does not restrict access.
- ✗
OCI Vault
Why it's wrong here
Vault is for managing encryption keys and secrets.
- ✗
Network security groups
Why it's wrong here
NSGs control network-level access, not user-level.
- ✓
IAM policies
Why this is correct
IAM policies define who can perform actions on resources.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
OCI often tests the distinction between network-level controls (network security groups) and identity-based controls (IAM policies), leading candidates to mistakenly choose NSGs because they think of 'limiting access' in terms of IP addresses or ports, rather than user identity.
Detailed technical explanation
How to think about this question
Under the hood, OCI IAM policies are evaluated by the OCI authorization engine before any API call is processed; the policy statement uses a resource-type like 'ai-service-language-model-family' and a verb such as 'use' to allow inference requests. A subtle behavior is that policies can be scoped to compartments or tenancies, and they support conditions like 'request.operation = 'InvokeModel'' for even finer granularity. In a real-world scenario, an administrator might combine an IAM policy with a network security group to enforce both identity-based and network-level controls, but only IAM policies address the user-level restriction asked in the question.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
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FAQ
Questions learners often ask
What does this 1Z0-1127 question test?
Fundamentals of Large Language Models — This question tests Fundamentals of Large Language Models — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: IAM policies — IAM policies are the correct resource type because they define authorization rules that control which users, groups, or service principals can invoke specific OCI APIs, including the LLM inference endpoint. By writing a policy with a verb like 'inspect' or 'use' on the resource type 'ai-service-language-family' or a specific model family, the administrator can grant or deny access to the LLM endpoint. This is the standard OCI mechanism for fine-grained access control to AI services.
What should I do if I get this 1Z0-1127 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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