- A
compute.requireOsLogin
Why wrong: This enforces OS Login, not external IP restrictions.
- B
compute.disableSerialPortAccess
Why wrong: This disables serial port access, not external IPs.
- C
compute.vmExternalIpAccess
This constraint controls external IP access for VMs.
- D
iam.disableServiceAccountKeyCreation
Why wrong: This restricts service account key creation, not VM external IPs.
Question 296 of 1,000
PCDE Practice Question: Bootstrapping a Google Cloud Organisation for DevOps
This PCDE practice question tests your understanding of bootstrapping a google cloud organisation 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 wants to enforce that Compute Engine instances cannot have public IP addresses. Which organization policy constraint should be applied?
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
✓
compute.vmExternalIpAccess
The `compute.vmExternalIpAccess` constraint restricts which VM instances are allowed to have external IP addresses. When enforced as a list deny, it can block all external IPs.
Key principle: 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.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
compute.requireOsLogin
Why it's wrong here
This enforces OS Login, not external IP restrictions.
- ✗
compute.disableSerialPortAccess
Why it's wrong here
This disables serial port access, not external IPs.
- ✓
compute.vmExternalIpAccess
Why this is correct
This constraint controls external IP access for VMs.
Related concept
Standard ACLs match source addresses.
- ✗
iam.disableServiceAccountKeyCreation
Common exam traps
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.
Detailed technical explanation
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.
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.
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 PCDE ACL questions on filtering logic and placement.
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Bootstrapping a Google Cloud Organisation for DevOps — study guide chapter
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FAQ
Questions learners often ask
What does this PCDE question test?
Bootstrapping a Google Cloud Organisation for DevOps — This question tests Bootstrapping a Google Cloud Organisation for DevOps — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: compute.vmExternalIpAccess — The `compute.vmExternalIpAccess` constraint restricts which VM instances are allowed to have external IP addresses. When enforced as a list deny, it can block all external IPs.
What should I do if I get this PCDE 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 PCDE ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
This PCDE 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 PCDE exam.
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