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 team manages a GKE cluster with node pools using different machine types. They plan to upgrade the cluster to a new Kubernetes version. What is the safest upgrade strategy to minimize application downtime?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a surge upgrade to add new nodes before removing old ones.
Option C is correct because a surge upgrade in GKE adds new nodes with the desired Kubernetes version before removing old nodes, ensuring capacity is maintained throughout the process. This minimizes application downtime by allowing pods to be rescheduled onto new nodes before old nodes are drained, following a controlled rolling update pattern that respects PodDisruptionBudgets.
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.
✗
Perform a rolling upgrade by draining all nodes simultaneously.
Why it's wrong here
Draining all nodes at once would cause downtime.
✗
Create a new cluster with the desired version and migrate workloads.
Why it's wrong here
More complex and may cause extended downtime during migration.
✓
Use a surge upgrade to add new nodes before removing old ones.
Why this is correct
Surge upgrade maintains capacity during the upgrade, minimizing disruption.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Upgrade the node pool configuration one by one.
Why it's wrong here
Node pool changes do not upgrade the control plane.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that draining all nodes simultaneously is a valid rolling upgrade strategy, when in fact it causes complete downtime and violates Kubernetes best practices for workload availability.
Detailed technical explanation
How to think about this question
GKE's surge upgrade works by specifying 'maxSurge' and 'maxUnavailable' parameters (defaults: 1 and 0, respectively) in the node pool's upgrade settings. During the upgrade, GKE creates new nodes with the target version, cordons old nodes, then drains and deletes them, ensuring the cluster's total capacity never drops below the desired size. This is particularly important in production environments with strict SLOs, as it allows workloads to be rescheduled gracefully without exceeding resource limits.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
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: Use a surge upgrade to add new nodes before removing old ones. — Option C is correct because a surge upgrade in GKE adds new nodes with the desired Kubernetes version before removing old nodes, ensuring capacity is maintained throughout the process. This minimizes application downtime by allowing pods to be rescheduled onto new nodes before old nodes are drained, following a controlled rolling update pattern that respects PodDisruptionBudgets.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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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