- A
roles/storage.legacyBucketReader
Why wrong: This role only provides read access to bucket metadata and does not allow managing objects.
- B
roles/storage.admin
Why wrong: This role grants full control over all storage resources, including the ability to create and delete buckets and objects, which violates the 'not create or delete' criterion.
- C
roles/storage.objectViewer
Why wrong: This role provides read-only access to objects and their metadata; it does not allow management (write) operations such as updating metadata or setting permissions.
- D
roles/storage.objectAdmin
Correct. This role allows full management of objects (create, read, update, delete) without allowing bucket creation or deletion.
Question 854 of 1,000
PCSE IAM predefined roles Practice Question
This PCSE practice question tests your understanding of configuring access within a cloud solution environment. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: iAM predefined roles. 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.
Which IAM role should be assigned to a user who needs to manage, but not create or delete, Cloud Storage buckets and objects in a specific project?
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
✓
roles/storage.objectAdmin
The correct role is roles/storage.objectAdmin. This role grants full control over Cloud Storage objects, including the ability to read, write, update, and delete objects, but it does not allow any operations on buckets (create, delete, or configure). The user needs to manage objects (which includes write and delete operations) but should not be able to create or delete buckets. Storage Object Admin fits this requirement. Option C, roles/storage.objectViewer, only provides read-only access and does not allow management. Option B, roles/storage.admin, provides full control over both buckets and objects, including create and delete permissions. Option A, roles/storage.legacyBucketReader, only allows reading bucket metadata, not objects.
Key principle: IAM predefined roles
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
roles/storage.legacyBucketReader
Why it's wrong here
This role only provides read access to bucket metadata and does not allow managing objects.
- ✗
roles/storage.admin
Why it's wrong here
This role grants full control over all storage resources, including the ability to create and delete buckets and objects, which violates the 'not create or delete' criterion.
- ✗
roles/storage.objectViewer
Why it's wrong here
This role provides read-only access to objects and their metadata; it does not allow management (write) operations such as updating metadata or setting permissions.
- ✓
roles/storage.objectAdmin
Why this is correct
Correct. This role allows full management of objects (create, read, update, delete) without allowing bucket creation or deletion.
Related concept
IAM predefined roles
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap is confusing Storage Object Admin (which allows object creation and deletion) with the ability to manage buckets. Object Admin does not allow bucket operations such as create, delete, or update bucket configurations.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- IAM predefined roles
- Storage Object Admin (roles/storage.objectAdmin)
- Storage Object Viewer (roles/storage.objectViewer)
- Least privilege principle
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
IAM predefined roles
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 iAM predefined roles, then practise related PCSE questions on the same topic to reinforce the concept.
- →
Configuring Access Within a Cloud Solution Environment — study guide chapter
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FAQ
Questions learners often ask
What does this PCSE question test?
Configuring Access Within a Cloud Solution Environment — This question tests Configuring Access Within a Cloud Solution Environment — IAM predefined roles.
What is the correct answer to this question?
The correct answer is: roles/storage.objectAdmin — The correct role is roles/storage.objectAdmin. This role grants full control over Cloud Storage objects, including the ability to read, write, update, and delete objects, but it does not allow any operations on buckets (create, delete, or configure). The user needs to manage objects (which includes write and delete operations) but should not be able to create or delete buckets. Storage Object Admin fits this requirement. Option C, roles/storage.objectViewer, only provides read-only access and does not allow management. Option B, roles/storage.admin, provides full control over both buckets and objects, including create and delete permissions. Option A, roles/storage.legacyBucketReader, only allows reading bucket metadata, not objects.
What should I do if I get this PCSE question wrong?
Review iAM predefined roles, then practise related PCSE questions on the same topic to reinforce the concept.
What is the key concept behind this question?
IAM predefined roles
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Last reviewed: Jul 4, 2026
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