The answer is to create a Cloud HSM key ring in the desired region, configure a key with a 90-day rotation period, and apply it as a customer-managed encryption key (CMEK) for the BigQuery dataset. This approach is correct because Cloud HSM provides FIPS 140-2 Level 3 hardware-backed key generation and storage, which satisfies the government contractor’s compliance requirements under Assured Workloads, while the 90-day rotation period ensures the key lifecycle policy is enforced automatically by Cloud KMS. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of how CMEK integrates with BigQuery and Assured Workloads, particularly the need to match the key ring’s regional location to the dataset’s region—a common trap is assuming default global keys suffice. Remember, for Cloud HSM key rotation for BigQuery in Assured Workloads, the key ring must be in the same region as the data, and rotation is set on the key version, not the key ring itself. Memory tip: “HSM + CMEK + 90-day rotation = regional compliance.”
PCSE Supporting compliance requirements Practice Question
This PCSE practice question tests your understanding of supporting compliance requirements. 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 government contractor uses Google Cloud with Assured Workloads. They need to ensure that data stored in BigQuery is encrypted with keys generated and stored in a Cloud HSM key ring located in a specific region. The keys must be rotated every 90 days. Which approach meets these requirements?
Create a Cloud HSM key ring in the desired region, create a key with a rotation period of 90 days, and use that key to protect the BigQuery dataset via CMEK.
Cloud HSM keys can be used for CMEK, and rotation is automated.
B
Use Cloud KMS with a software key and enable automatic rotation of 90 days.
Why wrong: Software keys do not provide the hardware security required by Assured Workloads for certain compliance levels.
C
Create a Cloud HSM key ring and manually rotate keys every 90 days.
Why wrong: Manual rotation is not required; automatic rotation is available.
D
Use Cloud External Key Manager (EKM) with an external key management partner.
Why wrong: EKM uses keys outside Google Cloud, not stored in Cloud HSM.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a Cloud HSM key ring in the desired region, create a key with a rotation period of 90 days, and use that key to protect the BigQuery dataset via CMEK.
Option A is correct because it uses a Cloud HSM key ring in the desired region, which meets the requirement for hardware-backed key generation and storage. Setting a rotation period of 90 days on the key satisfies the rotation requirement, and using that key as a customer-managed encryption key (CMEK) for BigQuery ensures data is encrypted with the specified key.
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.
✓
Create a Cloud HSM key ring in the desired region, create a key with a rotation period of 90 days, and use that key to protect the BigQuery dataset via CMEK.
Why this is correct
Cloud HSM keys can be used for CMEK, and rotation is automated.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Cloud KMS with a software key and enable automatic rotation of 90 days.
Why it's wrong here
Software keys do not provide the hardware security required by Assured Workloads for certain compliance levels.
✗
Create a Cloud HSM key ring and manually rotate keys every 90 days.
Why it's wrong here
Manual rotation is not required; automatic rotation is available.
✗
Use Cloud External Key Manager (EKM) with an external key management partner.
Why it's wrong here
EKM uses keys outside Google Cloud, not stored in Cloud HSM.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between Cloud HSM and Cloud KMS software keys, where candidates may overlook that only Cloud HSM provides hardware-backed key storage, or confuse automatic rotation with manual rotation, leading them to choose a less secure or non-compliant option.
Detailed technical explanation
How to think about this question
Cloud HSM provides FIPS 140-2 Level 3 validated hardware security modules, ensuring keys never leave the HSM boundary. When a CMEK is used with BigQuery, the key is used to wrap the data encryption keys (DEKs) that encrypt the actual data, and the rotation period on the key automatically generates a new key version every 90 days without manual intervention. This approach is critical for compliance regimes like FedRAMP or PCI DSS that mandate hardware-backed key management and periodic rotation.
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: Create a Cloud HSM key ring in the desired region, create a key with a rotation period of 90 days, and use that key to protect the BigQuery dataset via CMEK. — Option A is correct because it uses a Cloud HSM key ring in the desired region, which meets the requirement for hardware-backed key generation and storage. Setting a rotation period of 90 days on the key satisfies the rotation requirement, and using that key as a customer-managed encryption key (CMEK) for BigQuery ensures data is encrypted with the specified key.
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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