The correct strategy is to export audit logs to Cloud Storage and apply a locked retention policy of seven years. This works because a locked retention policy enforces immutability at the object level, meaning no user—including project owners or admins—can delete, overwrite, or modify the log files until the retention period expires. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of compliance-driven storage controls, often appearing as a trap where candidates might choose a lifecycle rule or a simple bucket lock without the "locked" state. The key distinction is that a retention policy must be locked (irreversible) to guarantee immutability; an unlocked policy can be removed. For memory, think "Lock it and leave it"—once the policy is locked, the logs are sealed for the full seven years, meeting regulatory requirements for audit log retention with Cloud Storage.
PCSE Supporting compliance requirements Practice Question
This PCSE practice question tests your understanding of supporting compliance requirements. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 financial services company must retain audit logs for seven years to meet regulatory requirements. They are using Cloud Audit Logs. Which strategy should they implement to ensure logs are not deleted or modified during the retention period?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Export logs to Cloud Storage and apply a retention policy that is locked to prevent deletion.
Option C is correct because Cloud Storage buckets with a locked retention policy provide immutable storage, preventing any deletion or modification of objects during the retention period. This meets the regulatory requirement for audit logs to be retained for seven years without alteration. Exporting logs to Cloud Storage and locking the retention policy ensures compliance with data retention regulations.
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.
✗
Export logs to BigQuery and set table expiration to 7 years.
Why it's wrong here
BigQuery tables can be deleted or modified by users with permissions.
✗
Export logs to a Pub/Sub topic, then subscribe and store in a custom database.
Why it's wrong here
This adds complexity but still depends on database immutability.
✓
Export logs to Cloud Storage and apply a retention policy that is locked to prevent deletion.
Why this is correct
Cloud Storage retention policies with lock ensure objects cannot be deleted or overwritten until retention period expires.
Related concept
Read the scenario before looking for a memorised answer.
✗
Store logs in the default Cloud Logging bucket and set a retention period of 7 years.
Why it's wrong here
The default bucket is not locked and can be deleted.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that the default Cloud Logging bucket can be configured with long retention periods, but in reality, it only supports up to 30 days, and candidates must recognize that exporting to Cloud Storage with a locked retention policy is the only immutable option for multi-year retention.
Detailed technical explanation
How to think about this question
Cloud Storage retention policies use a bucket-level setting that, when locked, enforces object immutability for the specified duration. The lock is irreversible, meaning the retention policy cannot be reduced or removed once applied. This mechanism relies on the bucket's metadata and object versioning can be enabled to further protect against overwrites, ensuring audit logs remain tamper-proof for the entire seven-year period.
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: Export logs to Cloud Storage and apply a retention policy that is locked to prevent deletion. — Option C is correct because Cloud Storage buckets with a locked retention policy provide immutable storage, preventing any deletion or modification of objects during the retention period. This meets the regulatory requirement for audit logs to be retained for seven years without alteration. Exporting logs to Cloud Storage and locking the retention policy ensures compliance with data retention regulations.
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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Question Discussion
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