- A
Create a dedicated GCP service account with necessary roles and bind it to Kubernetes service accounts via Workload Identity.
This grants minimal required permissions to the workload, following the principle of least privilege, and leverages Workload Identity for secure access.
- B
Use the Compute Engine default service account on each node.
Why wrong: The default service account may not have the required permissions, and using node-level service accounts does not provide pod-level isolation.
- C
Use a secrets management solution like HashiCorp Vault to store service account keys and retrieve them at runtime.
Why wrong: While Vault manages secrets, it still requires storing keys outside GCP and does not eliminate the need for keys; Workload Identity is the recommended native approach.
- D
Enable Workload Identity on the GKE cluster.
Workload Identity allows pods to use a Kubernetes service account that binds to a GCP service account, enabling secure access to GCP APIs without keys.
- E
Store service account keys in a Kubernetes Secret and mount them into pods.
Why wrong: This practice is insecure because keys are stored in the cluster and could be exposed; it goes against the goal of eliminating key management.
Google PCA Manage and provision cloud infrastructure Practice Question
This PCA practice question tests your understanding of manage and provision cloud infrastructure. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 DevOps team is deploying a microservices application on Google Kubernetes Engine (GKE). They want to ensure that the pods can securely access Google Cloud APIs (e.g., Cloud Storage) without managing service account keys. Which TWO steps should they take? (Choose two.)
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
Create a dedicated GCP service account with necessary roles and bind it to Kubernetes service accounts via Workload Identity.
Option A is correct because Workload Identity allows you to bind a Kubernetes service account to a GCP service account, enabling pods to authenticate to Google Cloud APIs (e.g., Cloud Storage) without managing or storing service account keys. This eliminates the security risk of key leakage and simplifies credential rotation. Option D is correct because Workload Identity must be explicitly enabled on the GKE cluster (using the `--workload-pool` flag or via the console) before the binding can be established.
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.
- ✓
Create a dedicated GCP service account with necessary roles and bind it to Kubernetes service accounts via Workload Identity.
Why this is correct
This grants minimal required permissions to the workload, following the principle of least privilege, and leverages Workload Identity for secure access.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use the Compute Engine default service account on each node.
Why it's wrong here
The default service account may not have the required permissions, and using node-level service accounts does not provide pod-level isolation.
- ✗
Use a secrets management solution like HashiCorp Vault to store service account keys and retrieve them at runtime.
Why it's wrong here
While Vault manages secrets, it still requires storing keys outside GCP and does not eliminate the need for keys; Workload Identity is the recommended native approach.
- ✓
Enable Workload Identity on the GKE cluster.
Why this is correct
Workload Identity allows pods to use a Kubernetes service account that binds to a GCP service account, enabling secure access to GCP APIs without keys.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store service account keys in a Kubernetes Secret and mount them into pods.
Why it's wrong here
This practice is insecure because keys are stored in the cluster and could be exposed; it goes against the goal of eliminating key management.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that storing keys in Kubernetes Secrets or using node-level default service accounts is acceptable for secure API access, when in fact Workload Identity is the recommended, keyless approach for GKE.
Detailed technical explanation
How to think about this question
Workload Identity works by configuring a trust relationship between the GKE cluster's workload identity pool and a GCP service account; the pod's Kubernetes service account token is exchanged for a GCP access token via the metadata server, using the OIDC protocol. Under the hood, GKE automatically configures the node's metadata server to impersonate the bound GCP service account, so pods never handle raw keys. In a real-world scenario, if a pod needs to read from Cloud Storage, you would create a GCP service account with `roles/storage.objectViewer`, bind it to a Kubernetes service account via an annotation (e.g., `iam.gke.io/gcp-service-account: my-sa@project.iam.gserviceaccount.com`), and deploy the pod with that Kubernetes service account.
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.
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FAQ
Questions learners often ask
What does this PCA question test?
Manage and provision cloud infrastructure — This question tests Manage and provision cloud infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a dedicated GCP service account with necessary roles and bind it to Kubernetes service accounts via Workload Identity. — Option A is correct because Workload Identity allows you to bind a Kubernetes service account to a GCP service account, enabling pods to authenticate to Google Cloud APIs (e.g., Cloud Storage) without managing or storing service account keys. This eliminates the security risk of key leakage and simplifies credential rotation. Option D is correct because Workload Identity must be explicitly enabled on the GKE cluster (using the `--workload-pool` flag or via the console) before the binding can be established.
What should I do if I get this PCA 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
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