The answer is that no additional action is required because Cloud SQL automatically encrypts all backups at rest by default. This is correct because Cloud SQL enforces encryption at rest for both live data and backups using either Google-managed encryption keys or customer-managed encryption keys (CMEK) if you choose to configure them, meaning the encryption is a built-in, always-on feature of the service. On the Google Professional Cloud Security Engineer exam, this concept tests your understanding that PCI DSS compliance for backup encryption is met out of the box, and the common trap is assuming you must manually enable backup encryption or configure a separate key policy. Remember the memory tip: “Backups are born encrypted” — Cloud SQL never stores a backup in plaintext, so you can focus on key management rather than enabling encryption.
PCSE Supporting compliance requirements Practice Question
This PCSE practice question tests your understanding of supporting compliance requirements. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 retail company processes customer payment data and must comply with PCI DSS. They use Cloud SQL for database storage. They need to ensure that all database backups are encrypted at rest. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
No additional action required; Cloud SQL automatically encrypts backups.
C is correct because Cloud SQL automatically encrypts all data at rest, including backups, using either Google-managed encryption keys or customer-managed encryption keys (CMEK) if configured. No additional action is required to enable backup encryption by default, as this is a built-in feature of the service to meet PCI DSS compliance requirements.
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 HSM to generate a key and store in Cloud Storage for backup encryption.
Why it's wrong here
Backups are already encrypted by Cloud SQL.
✗
Enable Cloud DLP to inspect and encrypt backup data.
Why it's wrong here
Cloud DLP does not encrypt backups.
✓
No additional action required; Cloud SQL automatically encrypts backups.
Read the scenario before looking for a memorised answer.
✗
Use Cloud KMS to create a CMEK key and attach it to the Cloud SQL instance.
Why it's wrong here
CMEK is an option but not required; default encryption already satisfies PCI DSS.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that you must explicitly enable or configure encryption for Cloud SQL backups, when in fact Google Cloud automatically encrypts all data at rest by default, including backups, using server-side encryption.
Detailed technical explanation
How to think about this question
Cloud SQL uses AES-256 encryption for data at rest, including automatic backups, with keys managed by Google's key management infrastructure. If a customer requires CMEK, they can create a key in Cloud KMS and associate it with the Cloud SQL instance during creation or via a supported update, but this is not mandatory for compliance. Under the hood, Cloud SQL integrates with Google's storage layer to encrypt backup files before writing them to persistent disks, ensuring encryption is transparent to the user.
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.
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.
Supporting compliance requirements — This question tests Supporting compliance requirements — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: No additional action required; Cloud SQL automatically encrypts backups. — C is correct because Cloud SQL automatically encrypts all data at rest, including backups, using either Google-managed encryption keys or customer-managed encryption keys (CMEK) if configured. No additional action is required to enable backup encryption by default, as this is a built-in feature of the service to meet PCI DSS compliance requirements.
What should I do if I get this PCSE 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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This PCSE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCSE exam.
Question Discussion
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