Google PCA Manage implementation of cloud architecture Practice Question
Exhibit
{
"textPayload": "Error 403: The caller does not have permission to access the resource. Request prohibited by organization's policy. [ORGANIZATION_POLICY: constraints/iam.allowedPolicyMemberDomains]"
}Refer to the exhibit. A cloud administrator is attempting to grant the BigQuery Data Viewer role to an external user (user@example.com) but receives the error shown. What is the most likely cause?
⚠ Common exam trap
Google often tests the distinction between IAM permission errors and organization policy constraints, where candidates mistakenly focus on the administrator's permissions (Option C) rather than the broader policy that blocks external members.
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
✓
The organization policy constraints/iam.allowedPolicyMemberDomains blocks external domains.
The error indicates that the organization's policy constraints/iam.allowedPolicyMemberDomains is blocking the addition of an external user. This constraint restricts IAM policy bindings to only allow members from specified domains, and since user@example.com is from an external domain, the binding is denied. The error message directly references this constraint, making it the most likely cause.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The organization policy constraints/iam.allowedPolicyMemberDomains blocks external domains.
Why this is correct
The error includes '[ORGANIZATION_POLICY: constraints/iam.allowedPolicyMemberDomains]', indicating this policy is blocking the external user.
- ✗
The BigQuery dataset requires domain-wide delegation.
Why it's wrong here
Domain-wide delegation is for service accounts, not for granting roles to users.
- ✗
The user does not have the resourcemanager.projects.setIamPolicy permission.
Why it's wrong here
This would cause a different error (e.g., permission denied on the resource). The error specifically mentions organization policy.
- ✗
The external user must first be added to a Google Group.
Why it's wrong here
While adding to a group could bypass domain restrictions if the group's domain is allowed, the error directly points to the organization policy.
Go deeper
Related to this question
Learn chapter
Introduction to Google Cloud Platform
Key term
BigQuery
BigQuery is a fully managed, serverless data warehouse on Google Cloud that lets you run fast SQL queries on massive datasets without managing any infrastructure.
Key term
Least privilege
Least privilege is a security principle that means giving users, systems, or programs only the minimum permissions they need to do their job and nothing more.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCA exam.