Google ACE Deploying and implementing a cloud solution Practice Question
This ACE practice question tests your understanding of deploying and implementing a cloud solution. 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 deploying a stateful application on GKE that requires each pod to have its own persistent disk. Which TWO Kubernetes resources are essential for this deployment? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
StatefulSet
A StatefulSet is essential because it provides stable, unique network identifiers and ordered, graceful deployment and scaling for stateful applications, ensuring each pod maintains its identity and persistent storage binding across rescheduling. A PersistentVolumeClaim (PVC) is required to request and bind a persistent disk to each pod, enabling the pod to retain its data independently of other pods in the set.
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.
✗
Deployment
Why it's wrong here
Deployment is for stateless applications; pods are interchangeable and may share PVCs.
✗
ConfigMap
Why it's wrong here
ConfigMap stores configuration data, not persistent storage.
✓
StatefulSet
Why this is correct
StatefulSet provides stable identities and storage for stateful applications.
Related concept
Read the scenario before looking for a memorised answer.
✗
Ingress
Why it's wrong here
Ingress manages external access, not storage.
✓
PersistentVolumeClaim (PVC)
Why this is correct
PVCs are required to claim persistent storage; in StatefulSets, volumeClaimTemplates create them automatically.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that a Deployment can handle stateful workloads with persistent storage, but the trap is that a Deployment does not guarantee stable pod identities or ordered PVC binding, causing data loss or identity conflicts when pods are rescheduled.
Detailed technical explanation
How to think about this question
Under the hood, a StatefulSet uses a headless Service (with `clusterIP: None`) to create DNS records for each pod (e.g., `pod-0.service.namespace.svc.cluster.local`), ensuring stable network identities. Each pod’s PVC is created from a `volumeClaimTemplate` defined in the StatefulSet spec, and the PVC name includes the pod’s ordinal index (e.g., `data-pod-0`), so even if the pod is rescheduled to a different node, it reattaches to the same persistent disk via the same PVC. In a real-world scenario, deploying a Cassandra or MySQL cluster on GKE requires this exact pattern to maintain data integrity and cluster membership across pod restarts.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this ACE question in full detail.
Deploying and implementing a cloud solution — This question tests Deploying and implementing a cloud solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: StatefulSet — A StatefulSet is essential because it provides stable, unique network identifiers and ordered, graceful deployment and scaling for stateful applications, ensuring each pod maintains its identity and persistent storage binding across rescheduling. A PersistentVolumeClaim (PVC) is required to request and bind a persistent disk to each pod, enabling the pod to retain its data independently of other pods in the set.
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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Question Discussion
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