- A
Rotate the key files every 90 days and redistribute them securely
Why wrong: Rotating keys reduces the window of exposure but doesn't eliminate the risk — key files on developer laptops remain vulnerable to theft.
- B
Encrypt the JSON key files using Cloud KMS before distributing
Why wrong: Encrypting keys before distribution adds a step but doesn't solve the core problem — the key material still exists on developer machines.
- C
Remove the key files and use service account impersonation or Workload Identity for workloads that need GCP access
Eliminating key files is the recommended approach. GCE VMs use attached service accounts; GKE uses Workload Identity; external systems use Workload Identity Federation — no downloadable keys needed.
- D
Store the key files in Secret Manager and retrieve them at application startup
Why wrong: Storing keys in Secret Manager reduces distribution risk but the key still exists and must be materialized at runtime — eliminating the key entirely is preferable.
Quick Answer
The correct remediation is to remove the static key files and use service account impersonation or Workload Identity instead. This is because a JSON key file is a long-lived, persistent credential that, once exfiltrated from a developer laptop, grants indefinite access to GCP resources—it cannot be revoked without deleting the key itself. Service account impersonation, via the `iamcredentials.googleapis.com` API, issues short-lived access tokens that expire automatically, while Workload Identity binds GKE or GCE workloads to a service account without ever distributing a key file. On the Google Associate Cloud Engineer exam, this question tests your understanding of the principle of least privilege and the shift from static keys to federated identity; a common trap is choosing to rotate keys or restrict permissions, but the core issue is eliminating the long-lived secret entirely. Memory tip: think of static keys as a permanent house key you hand out, while impersonation is like a hotel key card that self-destructs after checkout.
Google ACE Configuring access and security Practice Question
This ACE practice question tests your understanding of configuring access and security. 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 security review identifies that service account JSON key files are stored on multiple developer laptops, posing a data exfiltration risk. What is the recommended remediation?
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
Remove the key files and use service account impersonation or Workload Identity for workloads that need GCP access
Option C is correct because storing service account JSON key files on developer laptops creates a persistent credential that can be exfiltrated. The recommended remediation is to remove these static keys entirely and instead use service account impersonation (via the `iamcredentials.googleapis.com` API) or Workload Identity (for GKE or GCE workloads) to obtain short-lived access tokens. This eliminates the long-lived secret and follows Google's principle of using federated identity rather than distributing static keys.
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.
- ✗
Rotate the key files every 90 days and redistribute them securely
Why it's wrong here
Rotating keys reduces the window of exposure but doesn't eliminate the risk — key files on developer laptops remain vulnerable to theft.
- ✗
Encrypt the JSON key files using Cloud KMS before distributing
Why it's wrong here
Encrypting keys before distribution adds a step but doesn't solve the core problem — the key material still exists on developer machines.
- ✓
Remove the key files and use service account impersonation or Workload Identity for workloads that need GCP access
Why this is correct
Eliminating key files is the recommended approach. GCE VMs use attached service accounts; GKE uses Workload Identity; external systems use Workload Identity Federation — no downloadable keys needed.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store the key files in Secret Manager and retrieve them at application startup
Why it's wrong here
Storing keys in Secret Manager reduces distribution risk but the key still exists and must be materialized at runtime — eliminating the key entirely is preferable.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that moving a secret to a more secure storage (like Secret Manager or encryption) is sufficient, when the correct answer requires eliminating the static credential entirely through impersonation or workload identity federation.
Detailed technical explanation
How to think about this question
Service account impersonation works by allowing a workload to call `google.iam.credentials.generateAccessToken` with a short-lived token (e.g., from a GCE metadata server or OAuth 2.0 refresh) to obtain a temporary access token for the target service account. Workload Identity for GKE uses a Kubernetes service account annotated with `iam.gke.io/gcp-service-account` to automatically mint tokens via the GKE metadata server, avoiding any key file on the node. A subtle behavior: even with Secret Manager, the JSON key's `private_key_id` and `private_key` fields are static and can be used offline to sign JWTs, making them equivalent to a password that never expires unless rotated.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this ACE question test?
Configuring access and security — This question tests Configuring access and security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Remove the key files and use service account impersonation or Workload Identity for workloads that need GCP access — Option C is correct because storing service account JSON key files on developer laptops creates a persistent credential that can be exfiltrated. The recommended remediation is to remove these static keys entirely and instead use service account impersonation (via the `iamcredentials.googleapis.com` API) or Workload Identity (for GKE or GCE workloads) to obtain short-lived access tokens. This eliminates the long-lived secret and follows Google's principle of using federated identity rather than distributing static keys.
What should I do if I get this ACE 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 ACE 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 ACE exam.
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