Cloud Digital Leader roles/storage.objectViewer Practice Question
This GCDL practice question tests your understanding of roles/storage.objectviewer. 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. A key principle to apply: roles/storage.objectViewer. 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.
Exhibit
Refer to the exhibit.
```json
{
"bindings": [
{
"role": "roles/storage.objectViewer",
"members": [
"user:alice@example.com",
"serviceAccount:sa-bucket-reader@project.iam.gserviceaccount.com"
]
}
]
}
```
Refer to the exhibit. What level of access does this IAM policy grant to the members?
Exhibit
Refer to the exhibit.
```json
{
"bindings": [
{
"role": "roles/storage.objectViewer",
"members": [
"user:alice@example.com",
"serviceAccount:sa-bucket-reader@project.iam.gserviceaccount.com"
]
}
]
}
```
A
Permission to create new objects and read existing ones.
Why wrong: That would be roles/storage.objectCreator combined with objectViewer, but the policy only grants objectViewer.
B
Full control over objects including create, read, update, and delete.
Why wrong: That would be roles/storage.objectAdmin.
C
Full control over the bucket including listing and deleting.
Why wrong: That would be roles/storage.admin or roles/storage.objectAdmin with bucket-level permissions.
D
Read-only access to objects in the bucket.
roles/storage.objectViewer grants read access to objects.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Read-only access to objects in the bucket.
The IAM policy shown grants the `roles/storage.objectViewer` role, which includes `storage.objects.get` permission. This provides read-only access to objects in the bucket. It does not include any write or delete permissions, so members can only read existing objects. This matches option D.
Key principle: roles/storage.objectViewer
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Permission to create new objects and read existing ones.
Why it's wrong here
That would be roles/storage.objectCreator combined with objectViewer, but the policy only grants objectViewer.
✗
Full control over objects including create, read, update, and delete.
Why it's wrong here
That would be roles/storage.objectAdmin.
✗
Full control over the bucket including listing and deleting.
Why it's wrong here
That would be roles/storage.admin or roles/storage.objectAdmin with bucket-level permissions.
✓
Read-only access to objects in the bucket.
Why this is correct
roles/storage.objectViewer grants read access to objects.
Related concept
roles/storage.objectViewer
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap is that `roles/storage.objectViewer` includes `storage.objects.list` permission, allowing members to list objects, not just read. However, it does not grant any write or delete permissions. In this question, members have read-only access, but listing is also permitted.
Detailed technical explanation
How to think about this question
The `s3:GetObject` action is an IAM permission that maps to the HTTP GET and HEAD requests on S3 objects. Without `s3:ListBucket`, users cannot list objects in the bucket via the console or API; they must know the exact object key to access it. This is a common pattern for granting read-only access to specific objects while preventing enumeration.
KKey Concepts to Remember
roles/storage.objectViewer
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
roles/storage.objectViewer
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this GCDL question in full detail.
The correct answer is: Read-only access to objects in the bucket. — The IAM policy shown grants the `roles/storage.objectViewer` role, which includes `storage.objects.get` permission. This provides read-only access to objects in the bucket. It does not include any write or delete permissions, so members can only read existing objects. This matches option D.
What should I do if I get this GCDL question wrong?
Review roles/storage.objectViewer, then practise related GCDL questions on the same topic to reinforce the concept.
What is the key concept behind this question?
roles/storage.objectViewer
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Question Discussion
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