The correct answer is to use Cloud SQL’s backup encryption with a customer-managed encryption key (CMEK) by specifying a separate CMEK for backups. This works because Cloud SQL allows you to configure a distinct CMEK for automated backups that is independent from the key used to encrypt the primary database, enabling you to manage and rotate the backup key on its own schedule. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of Cloud SQL’s layered encryption options and the common trap is assuming that enabling CMEK on the instance automatically encrypts both data and backups with the same key—it does, but only if you don’t explicitly set a separate backup CMEK. A key memory tip is “backup key, separate key”: if the question mentions rotating backup keys independently, always think of specifying a different CMEK for backups, not relying on the instance-level CMEK or manual exports.
PCSE Ensuring data protection Practice Question
This PCSE practice question tests your understanding of ensuring data protection. 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 company uses Cloud SQL for MySQL with automated backups. They want to ensure that backup data is encrypted with a key that they manage and rotate on a schedule, separate from the primary database encryption. What should they do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Cloud SQL's backup encryption with customer-managed key by specifying a CMEK for backups.
Cloud SQL allows enabling CMEK for backups separately by specifying a different CMEK key for backup encryption. Enabling CMEK on the instance encrypts both data and backups with the same key. Exporting to Cloud Storage is not automated.
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.
✓
Use Cloud SQL's backup encryption with customer-managed key by specifying a CMEK for backups.
Why this is correct
Cloud SQL allows setting a separate CMEK for backups during instance creation or update.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable CMEK on the Cloud SQL instance, which automatically encrypts backups with the same key.
Why it's wrong here
This encrypts both data and backups with the same key, not a separate key.
✗
Use CSEK for the Cloud SQL instance and then re-encrypt backups.
Why it's wrong here
CSEK is not supported for Cloud SQL; also re-encrypting is not automated.
✗
Export backups to Cloud Storage and apply CMEK on the export bucket.
Why it's wrong here
This is not automated and does not use Cloud SQL's native backup encryption.
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 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.
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.
Ensuring data protection — This question tests Ensuring data protection — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud SQL's backup encryption with customer-managed key by specifying a CMEK for backups. — Cloud SQL allows enabling CMEK for backups separately by specifying a different CMEK key for backup encryption. Enabling CMEK on the instance encrypts both data and backups with the same key. Exporting to Cloud Storage is not automated.
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.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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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