- A
Add the auditor's email as a member with the Storage Admin role on the project.
Why wrong: Storage Admin is too permissive; the auditor would have full control over all buckets, including deletion.
- B
Use a signed URL for each object the auditor needs to see.
Why wrong: Signed URLs are for temporary access to specific objects, not suitable for ongoing read-only access to a set of buckets.
- C
Add the auditor's email as a member with the Storage Object Viewer role on each individual bucket.
Why wrong: While functionally correct, managing bucket-level roles for many buckets is cumbersome and less scalable than using project-level roles with conditions.
- D
Add the auditor's email as a member with the Storage Object Viewer role on the project, and use IAM Conditions to restrict access to specific bucket resources.
This grants read-only access to the specified buckets only, using conditions for fine-grained control.
Google ACE Configuring Access and Security Practice Question
This ACE practice question tests your understanding of configuring access and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 engineer needs to grant an external auditor read-only access to a subset of Cloud Storage buckets in a project. The auditor's identity is a Google account. Which IAM approach should the engineer use?
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
Add the auditor's email as a member with the Storage Object Viewer role on the project, and use IAM Conditions to restrict access to specific bucket resources.
The best practice is to grant the Storage Object Viewer role at the project level and then use IAM Conditions to restrict access to specific bucket resources. This avoids managing multiple bindings per bucket while ensuring the auditor only sees the intended buckets. Granting at the bucket level is possible but less scalable; granting Storage Admin is too permissive; using ACLs is legacy and more complex to audit.
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.
- ✗
Add the auditor's email as a member with the Storage Admin role on the project.
Why it's wrong here
Storage Admin is too permissive; the auditor would have full control over all buckets, including deletion.
- ✗
Use a signed URL for each object the auditor needs to see.
Why it's wrong here
Signed URLs are for temporary access to specific objects, not suitable for ongoing read-only access to a set of buckets.
- ✗
Add the auditor's email as a member with the Storage Object Viewer role on each individual bucket.
Why it's wrong here
While functionally correct, managing bucket-level roles for many buckets is cumbersome and less scalable than using project-level roles with conditions.
- ✓
Add the auditor's email as a member with the Storage Object Viewer role on the project, and use IAM Conditions to restrict access to specific bucket resources.
Why this is correct
This grants read-only access to the specified buckets only, using conditions for fine-grained control.
Related concept
Standard ACLs match source addresses.
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 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.
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 ACE ACL questions on filtering logic and placement.
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Configuring Access and Security — study guide chapter
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FAQ
Questions learners often ask
What does this ACE question test?
Configuring Access and Security — This question tests Configuring Access and Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Add the auditor's email as a member with the Storage Object Viewer role on the project, and use IAM Conditions to restrict access to specific bucket resources. — The best practice is to grant the Storage Object Viewer role at the project level and then use IAM Conditions to restrict access to specific bucket resources. This avoids managing multiple bindings per bucket while ensuring the auditor only sees the intended buckets. Granting at the bucket level is possible but less scalable; granting Storage Admin is too permissive; using ACLs is legacy and more complex to audit.
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.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
This ACE 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 ACE exam.
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