The answer is to create a custom role with the required read-only BigQuery permissions, grant it to the external auditors’ group, and attach an IAM condition using `request.time` to restrict access between 9 AM and 5 PM. This is correct because IAM conditions evaluate attributes like `request.time` at the time of the API call, allowing you to enforce time-based access natively without external scripts or network controls. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of IAM condition expressions and the `request.time` attribute, which is a common tool for compliance-driven access control. A frequent trap is confusing time-based conditions with VPC Service Controls or signed URLs, but remember that IAM conditions are the simplest native method for time-restricted access. Memory tip: think “time-bound IAM” as a digital lock that only opens during business hours, using `request.time` as the key.
PCSE Practice Question: Configuring access within a cloud solution environment
This PCSE practice question tests your understanding of configuring access within a cloud solution environment. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 wants to allow a group of external auditors read-only access to specific BigQuery datasets in a project, but only during working hours (9 AM to 5 PM). The auditors belong to an external Google Workspace domain. Which IAM configuration should be used?
Create a custom role with required permissions on the datasets, grant it to the auditors' group with an IAM condition using request.time between 9 AM and 5 PM.
IAM Conditions support time-based restrictions.
B
Configure a Cloud Scheduler job to add and remove the auditors' group membership at the required times.
Why wrong: This is not a recommended security practice and has delays.
C
Create an Organization Policy with a time constraint on the datasets.
Why wrong: Organization Policies do not support time-based constraints on datasets.
D
Use VPC Service Controls with an access level that allows during working hours.
Why wrong: VPC Service Controls restrict access at the perimeter level, not time-based.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a custom role with required permissions on the datasets, grant it to the auditors' group with an IAM condition using request.time between 9 AM and 5 PM.
Option A is correct because IAM conditions allow you to enforce time-based access using the `request.time` attribute, which can restrict access to specific hours. By granting a custom role with read-only permissions on the BigQuery datasets and attaching a condition that `request.time` falls between 9 AM and 5 PM, the auditors from the external Google Workspace domain will only have access during working hours. This approach is native to IAM and does not require external automation or network-level controls.
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.
✓
Create a custom role with required permissions on the datasets, grant it to the auditors' group with an IAM condition using request.time between 9 AM and 5 PM.
Why this is correct
IAM Conditions support time-based restrictions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure a Cloud Scheduler job to add and remove the auditors' group membership at the required times.
Why it's wrong here
This is not a recommended security practice and has delays.
✗
Create an Organization Policy with a time constraint on the datasets.
Why it's wrong here
Organization Policies do not support time-based constraints on datasets.
✗
Use VPC Service Controls with an access level that allows during working hours.
Why it's wrong here
VPC Service Controls restrict access at the perimeter level, not time-based.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse IAM conditions with Organization Policies or VPC Service Controls, thinking time-based access requires a separate service, when in fact IAM conditions with `request.time` provide a native, granular solution.
Detailed technical explanation
How to think about this question
IAM conditions use Common Expression Language (CEL) to evaluate attributes like `request.time` against a specified range. The `request.time` attribute is in UTC, so you must account for timezone offsets (e.g., using `timestamp('2025-01-01T09:00:00Z')` and `timestamp('2025-01-01T17:00:00Z')`). A real-world scenario is a financial audit where external auditors must only access data during business hours to comply with regulatory requirements; using IAM conditions ensures access is automatically revoked outside those hours without manual intervention.
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 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
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.
Configuring access within a cloud solution environment — This question tests Configuring access within a cloud solution environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a custom role with required permissions on the datasets, grant it to the auditors' group with an IAM condition using request.time between 9 AM and 5 PM. — Option A is correct because IAM conditions allow you to enforce time-based access using the `request.time` attribute, which can restrict access to specific hours. By granting a custom role with read-only permissions on the BigQuery datasets and attaching a condition that `request.time` falls between 9 AM and 5 PM, the auditors from the external Google Workspace domain will only have access during working hours. This approach is native to IAM and does not require external automation or network-level controls.
What should I do if I get this PCSE 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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