The answer is that the bindings grant alice and all users from example.com the ability to view objects, while the service account receives full administrative control. This is correct because the IAM policy bindings apply `roles/storage.objectViewer` to the specific user `alice@example.com` and to the entire `example.com` domain via the `domain:example.com` condition, which allows any authenticated user from that domain to list and read bucket objects. The `roles/storage.objectAdmin` role is assigned to a service account, giving it full permissions to create, delete, and modify objects. On the Google Professional Cloud Security Engineer exam, interpreting IAM policy bindings for Cloud Storage buckets tests your ability to distinguish between identity types like users, domains, and service accounts, and to recognize that `allUsers` or `allAuthenticatedUsers` are required for public access—a common trap is confusing domain-level access with public access. A helpful memory tip: “Domain is not public; it’s just a group of authenticated users from one organization.”
PCSE Ensuring data protection Practice Question
This PCSE practice question tests your understanding of ensuring data protection. 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.
alice can view objects; example.com users can view objects; service account can admin objects.
Why wrong: This is essentially the same as A, but A is more precise about 'all users from example.com'. However, both are correct; but A is the best answer.
B
alice and example.com domain can view; service account can admin; and the public can view because of domain.
Why wrong: Domain does not grant public access; it includes only users with accounts in that domain.
C
alice and all users from example.com can view objects; the service account can admin all objects.
This correctly describes the bindings.
D
alice can view; example.com can view; service account can admin; but only if the bucket is public.
Why wrong: The bucket does not need to be public for these IAM bindings to work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
alice and all users from example.com can view objects; the service account can admin all objects.
Option C is correct because the IAM policy bindings grant `roles/storage.objectViewer` to user `alice@example.com` and to all authenticated users from the `example.com` domain (via `domain:example.com`), and `roles/storage.objectAdmin` to a service account. The viewer role allows listing and reading objects, while the admin role allows full control over objects, including creation, deletion, and modification. There is no public access granted because the bindings do not include `allUsers` or `allAuthenticatedUsers`.
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.
✗
alice can view objects; example.com users can view objects; service account can admin objects.
Why it's wrong here
This is essentially the same as A, but A is more precise about 'all users from example.com'. However, both are correct; but A is the best answer.
✗
alice and example.com domain can view; service account can admin; and the public can view because of domain.
Why it's wrong here
Domain does not grant public access; it includes only users with accounts in that domain.
✓
alice and all users from example.com can view objects; the service account can admin all objects.
Why this is correct
This correctly describes the bindings.
Related concept
Read the scenario before looking for a memorised answer.
✗
alice can view; example.com can view; service account can admin; but only if the bucket is public.
Why it's wrong here
The bucket does not need to be public for these IAM bindings to work.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between `domain:` and `allUsers` — candidates mistakenly think a domain grant makes the bucket public, but it only grants access to authenticated users from that specific domain.
Detailed technical explanation
How to think about this question
In Google Cloud IAM, `roles/storage.objectViewer` includes permissions like `storage.objects.get` and `storage.objects.list`, while `roles/storage.objectAdmin` includes all object-level permissions (e.g., `storage.objects.create`, `storage.objects.delete`). The `domain:example.com` condition uses Google Workspace or Cloud Identity domain verification; it does not grant access to unauthenticated users or users outside that domain. IAM policies are evaluated at request time, and bucket-level ACLs or uniform bucket-level access can further restrict or override these bindings.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Ensuring data protection — This question tests Ensuring data protection — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: alice and all users from example.com can view objects; the service account can admin all objects. — Option C is correct because the IAM policy bindings grant `roles/storage.objectViewer` to user `alice@example.com` and to all authenticated users from the `example.com` domain (via `domain:example.com`), and `roles/storage.objectAdmin` to a service account. The viewer role allows listing and reading objects, while the admin role allows full control over objects, including creation, deletion, and modification. There is no public access granted because the bindings do not include `allUsers` or `allAuthenticatedUsers`.
What should I do if I get this PCSE 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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