Google PCA Manage implementation of cloud architecture Practice Question
This PCA practice question tests your understanding of manage implementation of cloud architecture. 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.
A financial services company uses VPC Service Controls to protect their project containing BigQuery datasets and Cloud Storage buckets. They have a perimeter that includes the BigQuery service. Users report that they cannot export data from BigQuery to Cloud Storage using the web console. The export job fails with an access denied error. The team needs to allow exports while maintaining data exfiltration prevention. The users have the necessary IAM permissions (BigQuery Data Editor, Storage Object Admin) on the appropriate resources. What should the architect do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add Cloud Storage to the same VPC Service Controls perimeter.
Option A is correct because VPC Service Controls perimeters enforce data exfiltration prevention by default, blocking egress from protected services (like BigQuery) to unprotected services (like Cloud Storage). Adding Cloud Storage to the same perimeter allows BigQuery to export data to Cloud Storage while still preventing data from leaving the perimeter. The users already have the necessary IAM roles (BigQuery Data Editor and Storage Object Admin), so the issue is solely the perimeter boundary, not permissions.
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.
✓
Add Cloud Storage to the same VPC Service Controls perimeter.
Why this is correct
Correct: This allows controlled data flow between BigQuery and Cloud Storage within the perimeter.
Related concept
Read the scenario before looking for a memorised answer.
✗
Remove BigQuery from the VPC Service Controls perimeter.
Why it's wrong here
Incorrect: This would disable data exfiltration prevention for BigQuery, increasing risk.
✗
Create an access level that permits exports during business hours.
Why it's wrong here
Incorrect: Access levels control ingress/egress based on client identity, not service-to-service data transfer.
✗
Grant the users the Storage Object Admin role at the bucket level.
Why it's wrong here
Incorrect: Users already have necessary IAM; the issue is VPC Service Controls blocking the export.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse IAM permissions with VPC Service Controls boundaries, assuming that granting the correct IAM roles (like Storage Object Admin) will resolve the access denied error, when in fact the error is caused by the perimeter blocking cross-service egress, not by insufficient IAM privileges.
Detailed technical explanation
How to think about this question
VPC Service Controls uses a perimeter to create a security boundary around Google Cloud services, blocking all egress traffic from protected services to services outside the perimeter unless explicitly allowed via egress rules or by including the target service in the same perimeter. The export from BigQuery to Cloud Storage uses the BigQuery Storage Write API or export jobs that rely on the Cloud Storage API; if Cloud Storage is outside the perimeter, the request is denied at the network layer by the VPC Service Controls enforcement point, regardless of IAM permissions. This is distinct from IAM, which governs who can perform an action, whereas VPC Service Controls governs where data can flow.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Manage implementation of cloud architecture — This question tests Manage implementation of cloud architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add Cloud Storage to the same VPC Service Controls perimeter. — Option A is correct because VPC Service Controls perimeters enforce data exfiltration prevention by default, blocking egress from protected services (like BigQuery) to unprotected services (like Cloud Storage). Adding Cloud Storage to the same perimeter allows BigQuery to export data to Cloud Storage while still preventing data from leaving the perimeter. The users already have the necessary IAM roles (BigQuery Data Editor and Storage Object Admin), so the issue is solely the perimeter boundary, not permissions.
What should I do if I get this PCA 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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