The answer is to set a rotation period, enable automatic rotation, and re-encrypt data with the new key version. This is correct because Cloud KMS key rotation is not just about generating a new key version; it must be scheduled automatically via a rotation period, and critically, existing ciphertext remains encrypted with the old key material unless you explicitly re-encrypt it using the new primary version. On the Google Professional Cloud Security Engineer exam, this question tests your understanding that automatic rotation is a built-in feature, not a manual process, and that old key versions must be retained for decryption—never destroyed immediately. A common trap is assuming rotation alone updates existing data, but the key concept is that rotation creates new versions while re-encryption moves data to the latest version. Memory tip: “Set, Enable, Re-encrypt”—the three actions to seal the rotation cycle.
PCSE Practice Question: Managing operations in a cloud solution environment
This PCSE practice question tests your understanding of managing operations in a cloud solution environment. 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.
Your organization uses Cloud Key Management Service (KMS) to encrypt data at rest. You need to rotate keys automatically every 90 days. Which THREE steps are required? (Choose 3)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Re-encrypt any data encrypted with older versions using the new key version.
Options B, C, and E are correct. You need to set a rotation period on the Cloud KMS key (B), enable automatic rotation (C), and re-encrypt any data encrypted with older versions using the new key version (E) to ensure data is protected by the new key. Option A is incorrect because rotation should be automatic. Option D is incorrect because old key versions should not be destroyed immediately; they are needed to decrypt existing data. Option F is unnecessary because automatic rotation is a built-in feature.
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.
✓
Re-encrypt any data encrypted with older versions using the new key version.
Why this is correct
Re-encryption ensures data is protected by the latest key version.
Related concept
Read the scenario before looking for a memorised answer.
✓
Enable automatic rotation on the key.
Why this is correct
Automatic rotation ensures the key is rotated on schedule without manual intervention.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a new key version every 90 days manually.
Why it's wrong here
Manual creation is not automatic and prone to human error.
✗
Ensure the key is destroyed after rotation.
Why it's wrong here
Old key versions must be retained to decrypt existing data.
✗
Use a Cloud Function to trigger rotation.
Why it's wrong here
Automatic rotation is built into Cloud KMS; a Cloud Function is unnecessary.
✓
Set a rotation period on the Cloud KMS key.
Why this is correct
The rotation period defines how often the key is rotated.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 PCSE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Managing operations in a cloud solution environment — This question tests Managing operations in a cloud solution environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Re-encrypt any data encrypted with older versions using the new key version. — Options B, C, and E are correct. You need to set a rotation period on the Cloud KMS key (B), enable automatic rotation (C), and re-encrypt any data encrypted with older versions using the new key version (E) to ensure data is protected by the new key. Option A is incorrect because rotation should be automatic. Option D is incorrect because old key versions should not be destroyed immediately; they are needed to decrypt existing data. Option F is unnecessary because automatic rotation is a built-in feature.
What should I do if I get this PCSE question wrong?
Identify which PCSE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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