- A
Add the Google service account as a member of the bucket with roles/storage.objectViewer
Why wrong: IAM bindings are defined on the resource (bucket) and specify members and roles; 'add member' is not a standard IAM operation.
- B
Bind the Google service account (linked to the Kubernetes service account via Workload Identity) to the bucket IAM policy with roles/storage.objectViewer
This is the correct approach: the GSA is granted the role, and pods using the mapped KSA inherit that access.
- C
Grant the Google service account roles/storage.objectViewer at the project level
Why wrong: Project-level access would allow all pods in the project to access the bucket, violating the principle of least privilege.
- D
Bind the Kubernetes service account to the bucket IAM policy with roles/storage.objectViewer
Why wrong: Kubernetes service accounts cannot be directly used in Google Cloud IAM; they must be mapped to a Google service account via Workload Identity.
Quick Answer
The answer is to bind the Google service account (GSA) linked to the Kubernetes service account via Workload Identity to the Cloud Storage bucket IAM policy with the roles/storage.objectViewer role. This is correct because Workload Identity allows a pod to authenticate as a specific GSA when it uses the corresponding Kubernetes service account, and since the bucket has uniform bucket-level access enabled, IAM permissions must be applied directly on the bucket resource rather than at the project level. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of how Workload Identity bridges Kubernetes and Google Cloud IAM, and a common trap is mistakenly granting the role at the project level, which would violate the uniform bucket-level access policy. Remember the key chain: KSA → GSA → bucket IAM binding, and think “uniform means direct on the bucket” to avoid the project-level pitfall.
PCSE Practice Question: Managing operations in a cloud solution environment
This PCSE practice question tests your understanding of managing operations in a cloud solution environment. 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 financial services company runs a sensitive application on Google Kubernetes Engine (GKE) with Workload Identity enabled. Security policy requires that only pods with a specific service account can access a Cloud Storage bucket containing customer data. The bucket has uniform bucket-level access enabled. What is the correct combination of IAM bindings to achieve this?
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
Bind the Google service account (linked to the Kubernetes service account via Workload Identity) to the bucket IAM policy with roles/storage.objectViewer
Workload Identity links a Kubernetes service account (KSA) to a Google service account (GSA). When a pod uses that KSA, it authenticates as the linked GSA. Since the bucket has uniform bucket-level access, IAM permissions must be granted directly on the bucket resource, not at the project level. Binding the GSA to the bucket with roles/storage.objectViewer ensures only pods using that specific KSA can read the bucket.
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.
- ✗
Add the Google service account as a member of the bucket with roles/storage.objectViewer
Why it's wrong here
IAM bindings are defined on the resource (bucket) and specify members and roles; 'add member' is not a standard IAM operation.
- ✓
Bind the Google service account (linked to the Kubernetes service account via Workload Identity) to the bucket IAM policy with roles/storage.objectViewer
Why this is correct
This is the correct approach: the GSA is granted the role, and pods using the mapped KSA inherit that access.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Grant the Google service account roles/storage.objectViewer at the project level
Why it's wrong here
Project-level access would allow all pods in the project to access the bucket, violating the principle of least privilege.
- ✗
Bind the Kubernetes service account to the bucket IAM policy with roles/storage.objectViewer
Why it's wrong here
Kubernetes service accounts cannot be directly used in Google Cloud IAM; they must be mapped to a Google service account via Workload Identity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between Kubernetes service accounts and Google service accounts, trapping candidates who try to bind a KSA directly to a Google Cloud resource instead of using the linked GSA via Workload Identity.
Detailed technical explanation
How to think about this question
Under the hood, Workload Identity uses a Kubernetes mutating webhook to project the GSA's credentials into the pod via a volume-mounted token (an OIDC token). The pod then uses this token to authenticate to Google Cloud APIs. When uniform bucket-level access is enabled, ACLs are disabled, and all access control is handled exclusively through IAM policies on the bucket resource. This means the GSA must be granted the appropriate IAM role directly on the bucket, not inherited from the project, to enforce least privilege.
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
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FAQ
Questions learners often ask
What does this PCSE question test?
Managing operations in a cloud solution environment — This question tests Managing operations in a cloud solution environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Bind the Google service account (linked to the Kubernetes service account via Workload Identity) to the bucket IAM policy with roles/storage.objectViewer — Workload Identity links a Kubernetes service account (KSA) to a Google service account (GSA). When a pod uses that KSA, it authenticates as the linked GSA. Since the bucket has uniform bucket-level access, IAM permissions must be granted directly on the bucket resource, not at the project level. Binding the GSA to the bucket with roles/storage.objectViewer ensures only pods using that specific KSA can read the bucket.
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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Last reviewed: Jun 30, 2026
This PCSE 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 PCSE exam.
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