The correct answer is to store model authentication keys in OCI Vault, deploy the model in a private VCN subnet, and restrict access through a bastion host or VPN. Deploying in a private subnet ensures the generative AI model endpoint is never exposed to the internet, enforcing network isolation and reducing the attack surface—a core requirement for strict security policies. This directly tests your understanding of OCI’s shared responsibility model and network segmentation, a frequent focus on the Oracle Cloud Infrastructure Generative AI Professional 1Z0-1127 exam. A common trap is assuming public subnets with security lists are sufficient, but private subnets with controlled ingress via bastion or FastConnect are mandatory for compliance. Remember the mnemonic “Private, Vault, Bastion” to recall the three pillars: private subnet for isolation, OCI Vault for key management, and bastion for authenticated access.
1Z0-1127 Deploying and Managing Generative AI on OCI Practice Question
This 1Z0-1127 practice question tests your understanding of deploying and managing generative ai on oci. 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 deploying a generative AI model on OCI for an internal application that must comply with strict security policies. The model will be accessed by a limited group of users. Which three actions should the administrator take to ensure security? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy the model in a private VCN subnet
Deploying the model in a private VCN subnet ensures that the model endpoint is not exposed to the internet, which is a fundamental security requirement for compliance with strict security policies. By placing the model in a private subnet, all traffic must traverse through a bastion host, VPN, or FastConnect, providing network isolation and reducing the attack surface. This aligns with OCI's shared responsibility model where the customer controls network security.
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.
✗
Expose the model endpoint to the internet for ease of access
Why it's wrong here
Public exposure increases security risk and is not recommended for internal apps.
✓
Deploy the model in a private VCN subnet
Why this is correct
A private subnet ensures the endpoint is not publicly accessible.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use IAM policies to restrict model endpoint access to specific users
Why this is correct
IAM policies provide fine-grained access control.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable audit logging to minimize storage costs
Why it's wrong here
Audit logging is essential for security compliance and monitoring.
✓
Store model authentication keys in OCI Vault
Why this is correct
OCI Vault securely stores and manages secrets like API keys.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think exposing the endpoint to the internet is acceptable if IAM policies are used, but network isolation (private subnet) is a separate and mandatory layer of defense that cannot be replaced by IAM alone.
Detailed technical explanation
How to think about this question
In OCI, a private subnet uses a route table that does not have a default route to an internet gateway, and security lists or network security groups (NSGs) can further restrict traffic at the subnet and VNIC level. For generative AI models, the endpoint is typically served via a REST API over HTTPS, and placing it in a private subnet forces all client access to go through a VPN or OCI FastConnect, ensuring encryption in transit and network-level authentication. This architecture is commonly used for sensitive workloads like healthcare or financial services where data residency and isolation are mandated.
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 network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deploying and Managing Generative AI on OCI — This question tests Deploying and Managing Generative AI on OCI — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy the model in a private VCN subnet — Deploying the model in a private VCN subnet ensures that the model endpoint is not exposed to the internet, which is a fundamental security requirement for compliance with strict security policies. By placing the model in a private subnet, all traffic must traverse through a bastion host, VPN, or FastConnect, providing network isolation and reducing the attack surface. This aligns with OCI's shared responsibility model where the customer controls network security.
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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Question Discussion
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