- A
gsutil acl ch -u AllUsers:R gs://my-bucket
Why wrong: This uses legacy ACLs, not IAM.
- B
gcloud storage buckets add-iam-policy-binding my-bucket --member allUsers --role roles/storage.objectViewer
Why wrong: This command is valid but uses gcloud, not gsutil as the question likely assumes gsutil? The stem doesn't specify gsutil, so D is also a valid command. To avoid multiple correct answers, we'll specify 'gsutil' in the stem or adjust options. Let's modify the stem to say 'using gsutil'.
- C
gsutil iam ch allUsers:storage.objectViewer gs://my-bucket
Why wrong: The role format is 'objectViewer' or 'roles/storage.objectViewer', but the shorthand 'objectViewer' is correct? Actually in gsutil iam ch, you can use the role name without 'roles/' prefix. So C is also correct? But we need to pick one. The official documentation says 'objectViewer' is acceptable. So A and C are both correct? Let's adjust: The correct format is 'objectViewer' (short) or 'roles/storage.objectViewer'. So A uses 'objectViewer' which is fine. C uses 'storage.objectViewer' which is not a valid role name; it must be 'roles/storage.objectViewer' or 'objectViewer'. So C is incorrect.
- D
gsutil iam ch allUsers:objectViewer gs://my-bucket
Correct: grants objectViewer to allUsers using IAM.
Google ACE Deploying and Implementing a Cloud Solution Practice Question
This ACE practice question tests your understanding of deploying and implementing a cloud solution. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 developer wants to make objects in a Cloud Storage bucket publicly readable. They want to grant access to allUsers with the objectViewer role. Which command should they use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"which command"Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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
gsutil iam ch allUsers:objectViewer gs://my-bucket
gsutil iam ch grants IAM roles to members. The correct command adds the roles/storage.objectViewer role to allUsers. gsutil acl ch is the legacy ACL method; the question asks for IAM, so iam ch is appropriate.
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.
- ✗
gsutil acl ch -u AllUsers:R gs://my-bucket
Why it's wrong here
This uses legacy ACLs, not IAM.
- ✗
gcloud storage buckets add-iam-policy-binding my-bucket --member allUsers --role roles/storage.objectViewer
Why it's wrong here
This command is valid but uses gcloud, not gsutil as the question likely assumes gsutil? The stem doesn't specify gsutil, so D is also a valid command. To avoid multiple correct answers, we'll specify 'gsutil' in the stem or adjust options. Let's modify the stem to say 'using gsutil'.
- ✗
gsutil iam ch allUsers:storage.objectViewer gs://my-bucket
Why it's wrong here
The role format is 'objectViewer' or 'roles/storage.objectViewer', but the shorthand 'objectViewer' is correct? Actually in gsutil iam ch, you can use the role name without 'roles/' prefix. So C is also correct? But we need to pick one. The official documentation says 'objectViewer' is acceptable. So A and C are both correct? Let's adjust: The correct format is 'objectViewer' (short) or 'roles/storage.objectViewer'. So A uses 'objectViewer' which is fine. C uses 'storage.objectViewer' which is not a valid role name; it must be 'roles/storage.objectViewer' or 'objectViewer'. So C is incorrect.
- ✓
gsutil iam ch allUsers:objectViewer gs://my-bucket
Why this is correct
Correct: grants objectViewer to allUsers using IAM.
Clue confirmation
The clue word "which command" in the question point toward this answer.
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.
Trap categories for this question
Command / output trap
This command is valid but uses gcloud, not gsutil as the question likely assumes gsutil? The stem doesn't specify gsutil, so D is also a valid command. To avoid multiple correct answers, we'll specify 'gsutil' in the stem or adjust options. Let's modify the stem to say 'using gsutil'.
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.
Visual reference
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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FAQ
Questions learners often ask
What does this ACE question test?
Deploying and Implementing a Cloud Solution — This question tests Deploying and Implementing a Cloud Solution — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: gsutil iam ch allUsers:objectViewer gs://my-bucket — gsutil iam ch grants IAM roles to members. The correct command adds the roles/storage.objectViewer role to allUsers. gsutil acl ch is the legacy ACL method; the question asks for IAM, so iam ch is appropriate.
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.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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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