PCDOE Optimizing service performance Practice Question
This PCDOE practice question tests your understanding of optimizing service performance. 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.
Refer to the exhibit. A DevOps engineer notices that instance-1 runs on older CPU platform. The application is sensitive to CPU features that are only available on Skylake or newer. Which action should be taken to optimize performance?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Stop instance-1 and update the minimum CPU platform to Skylake.
Option D is correct because stopping the instance and updating the minimum CPU platform to Skylake ensures that the instance is rescheduled onto a host that meets the required CPU feature set. This action directly addresses the application's sensitivity to CPU features available only on Skylake or newer, without requiring a full recreation or risking compatibility issues during live migration.
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.
✗
Live migrate instance-1 to a different host.
Why it's wrong here
Live migration moves the instance but the CPU platform may stay the same.
✗
Use Terraform to add a lifecycle rule to ignore changes.
Why it's wrong here
Lifecycle rules do not change the underlying platform.
✗
Terminate instance-1 and recreate it with a newer machine type.
Why it's wrong here
Recreating may not guarantee a newer platform unless min-cpu-platform is set.
✓
Stop instance-1 and update the minimum CPU platform to Skylake.
Why this is correct
Setting min-cpu-platform ensures the instance runs on at least Skylake.
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 distinction between live migration (which preserves the current CPU platform) and stop/start actions (which can change the host and CPU platform), leading candidates to incorrectly choose live migration as a quick fix.
Detailed technical explanation
How to think about this question
The minimum CPU platform feature in Google Compute Engine allows you to specify the lowest CPU generation (e.g., Skylake) for an instance. When you stop an instance and update this setting, the instance is rescheduled onto a host that meets or exceeds that CPU generation, ensuring availability of features like AVX-512 or AES-NI. This is distinct from machine type, which defines vCPU and memory; the CPU platform is a separate property that can be modified without changing the machine type.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Optimizing service performance — This question tests Optimizing service performance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Stop instance-1 and update the minimum CPU platform to Skylake. — Option D is correct because stopping the instance and updating the minimum CPU platform to Skylake ensures that the instance is rescheduled onto a host that meets the required CPU feature set. This action directly addresses the application's sensitivity to CPU features available only on Skylake or newer, without requiring a full recreation or risking compatibility issues during live migration.
What should I do if I get this PCDOE 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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