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ACE Practice Question: A security team wants to prevent authorized users…
This ACE practice question tests your understanding of a security team wants to prevent authorized users…. 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 security team wants to prevent authorized users from copying BigQuery query results to a dataset in a different GCP project that is outside the team's security boundary — even if the user has valid IAM permissions. Which control enforces this?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
IAM deny policies restricting cross-project BigQuery operations
IAM deny policies block specific IAM actions — they don't prevent an authorized user from copying data to an external project if they have the necessary permissions there.
B
Best answer
VPC Service Controls with a perimeter enclosing BigQuery
VPC Service Controls enforce context-aware access at the API level — data can't leave the perimeter to external projects regardless of IAM permissions, preventing exfiltration.
C
Distractor review
An organization policy preventing resource creation outside specific projects
Organization policies restrict what types of resources can be created — they don't prevent copying data between existing projects.
D
Distractor review
Cloud Armor rules blocking outbound API requests to BigQuery in other projects
Cloud Armor is a WAF for incoming HTTP traffic to load balancers — it doesn't control GCP API calls between projects.
Common exam trap
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Technical deep dive
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Related practice questions
Related ACE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
What is the correct order of the Google Cloud resource hierarchy from highest to lowest level?
Question 2
A compliance archive stores legal documents accessed at most once per quarter. Which Cloud Storage class minimizes storage cost while meeting that access pattern?
Question 3
Which gcloud command creates a Compute Engine VM named 'web-01' using the e2-medium machine type in zone us-central1-a?
Question 4
A team wants to receive an email alert when the average CPU utilization of VMs in a managed instance group exceeds 80% for more than 5 minutes. What should they create in Cloud Monitoring?
Question 5
A junior developer needs read-only access to all GCP resources in a project. Which IAM role grants the minimum permissions required?
Question 6
A startup creates its first Google Cloud project. Before deploying any paid resources, what must be linked to the project?
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FAQ
Questions learners often ask
What does this ACE question test?
Standard ACLs match source addresses.
What is the correct answer to this question?
The correct answer is: VPC Service Controls with a perimeter enclosing BigQuery — VPC Service Controls create a security perimeter around GCP services. Even users with valid IAM permissions cannot transfer data between services inside the perimeter and those outside it. This prevents data exfiltration scenarios where an authorized user exports data to an external project.
What should I do if I get this ACE question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related ACE ACL questions on filtering logic and placement.
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