This PCDOE practice question tests your understanding of bootstrapping a google cloud organization for devops. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 organization is bootstrapping their Google Cloud environment and wants to implement a shared VPC for DevOps workloads. The network team manages the host project, while DevOps teams have service projects. They need to ensure that DevOps teams can create resources in their service projects that use the shared VPC, but they cannot change the host project's network configuration. Which IAM roles should be granted to the DevOps team's service account on the host project?
roles/compute.securityViewer
Why wrong: This role only allows viewing security policies, not using networks.
roles/compute.admin
Why wrong: This role allows full control, including modifying networks.
roles/compute.networkAdmin
Why wrong: This role allows managing network resources, which is too broad.
roles/compute.networkUser
This role allows using existing networks and subnets but not modifying them.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
roles/compute.networkUser
The DevOps team needs to use the shared VPC's resources (e.g., subnets) from their service projects without modifying the host project's network configuration. The `roles/compute.networkUser` role grants permission to use existing networks and subnets in the host project, but not to create, modify, or delete them. This aligns with the principle of least privilege for a shared VPC setup.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
roles/compute.securityViewer
Why it's wrong here
This role only allows viewing security policies, not using networks.
roles/compute.admin
Why it's wrong here
This role allows full control, including modifying networks.
roles/compute.networkAdmin
Why it's wrong here
This role allows managing network resources, which is too broad.
roles/compute.networkUser
Why this is correct
This role allows using existing networks and subnets but not modifying them.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse `roles/compute.networkUser` with `roles/compute.networkAdmin`, assuming that using a shared VPC requires administrative privileges, when in fact the `networkUser` role is the minimal permission needed to consume network resources without managing them.
Detailed technical explanation
In a shared VPC architecture, the `compute.networkUser` role is specifically designed to allow service project principals to use the host project's subnets (e.g., for VM creation) without granting network administration permissions. This role is scoped to the host project or individual subnets via IAM conditions, and it enforces that the service project cannot modify VPC routes, firewall rules, or subnet ranges. A real-world scenario is when a DevOps team needs to deploy GKE clusters in a shared VPC; they require `compute.networkUser` on the host project to use the subnets for node pools.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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FAQ
Bootstrapping a Google Cloud organization for DevOps — This question tests Bootstrapping a Google Cloud organization for DevOps — Read the scenario before looking for a memorised answer..
The correct answer is: roles/compute.networkUser — The DevOps team needs to use the shared VPC's resources (e.g., subnets) from their service projects without modifying the host project's network configuration. The `roles/compute.networkUser` role grants permission to use existing networks and subnets in the host project, but not to create, modify, or delete them. This aligns with the principle of least privilege for a shared VPC setup.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
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