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ACE Practice Question: A team is migrating a stateful application with…
This ACE practice question tests your understanding of a team is migrating a stateful application with…. 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 team is migrating a stateful application with local disk writes to GKE. The application requires a dedicated persistent disk that follows the Pod if it's rescheduled to a different node. Which Kubernetes resource provides this?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
A PersistentVolumeClaim backed by a GCE persistent disk StorageClass
A PVC with a GCE persistent disk StorageClass provisions a durable disk that is detached from one node and reattached to the new node when the Pod is rescheduled.
B
Distractor review
A ConfigMap mounted as a volume
ConfigMaps store configuration data, not application-written state. They're read-only (by design) and not appropriate for stateful write workloads.
C
Distractor review
A HostPath volume pointing to a directory on the node
HostPath mounts a path on the specific node where the Pod runs — if the Pod is rescheduled to another node, it loses access to that data.
D
Distractor review
An emptyDir volume scoped to the Pod
emptyDir volumes are ephemeral — they exist only while the Pod is running and are deleted when the Pod is removed or rescheduled.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Related practice questions
Related ACE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
What is the correct order of the Google Cloud resource hierarchy from highest to lowest level?
Question 2
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Question 3
Which gcloud command creates a Compute Engine VM named 'web-01' using the e2-medium machine type in zone us-central1-a?
Question 4
A team wants to receive an email alert when the average CPU utilization of VMs in a managed instance group exceeds 80% for more than 5 minutes. What should they create in Cloud Monitoring?
Question 5
A junior developer needs read-only access to all GCP resources in a project. Which IAM role grants the minimum permissions required?
Question 6
A startup creates its first Google Cloud project. Before deploying any paid resources, what must be linked to the project?
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FAQ
Questions learners often ask
What does this ACE question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: A PersistentVolumeClaim backed by a GCE persistent disk StorageClass — A PersistentVolumeClaim (PVC) backed by a StorageClass provisions a persistent disk that is attached to the Pod wherever it's scheduled. The disk's data persists across Pod restarts and rescheduling. HostPath mounts local node storage — data is lost if the Pod moves to a different node.
What should I do if I get this ACE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ACE NAT questions on configuration and troubleshooting.
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