- A
Set up a Cloud Function triggered by Cloud Storage 'finalize' events. The function calls the DLP API to inspect the object, creates a redacted version, and deletes the original object, replacing it with the redacted data.
This is the standard serverless pattern for automatic redaction. Cloud Functions respond to new objects, DLP inspects and redacts, and the function rewrites the object with the redacted content.
- B
Enable a bucket retention policy and use DLP to scan objects and quarantine those with sensitive data by moving them to a different bucket.
Why wrong: Retention policy prevents object deletion or modification, which is opposite to the requirement of redacting and replacing. Quarantine moves data but does not redact.
- C
Use Cloud Storage Object Change Notifications to alert a Compute Engine instance that runs a DLP job to modify the object in place.
Why wrong: DLP cannot modify objects in place; it creates a new output. Also, using a persistent VM is less efficient and more complex than Cloud Functions.
- D
Use VPC Service Controls to create a secure perimeter around the bucket and then run DLP scans on a schedule.
Why wrong: VPC Service Controls restrict data exfiltration but do not perform redaction. This does not meet the requirement for automatic redaction on write.
Quick Answer
The answer is to set up a Cloud Function triggered by Cloud Storage 'finalize' events, which calls the DLP API to inspect and redact the object, then replaces the original with the redacted version. This approach is correct because DLP cannot modify objects in place; it always produces a new artifact, so the recommended pattern is to use an event-driven serverless function to automate the inspection and replacement workflow. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of combining Cloud Storage triggers with DLP for automated redaction, a common trap being the misconception that DLP can directly overwrite objects. A key memory tip is to remember that DLP is a scanning and transformation engine, not a storage modifier—think “trigger, inspect, replace” for the three-step flow.
PCSE Ensuring data protection Practice Question
This PCSE practice question tests your understanding of ensuring data protection. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 operates a hybrid cloud environment with on-premises data centers and Google Cloud Platform. They store sensitive customer data in Cloud Storage buckets and use Data Loss Prevention (DLP) to scan for and inspect sensitive content. They have automated DLP inspection jobs that run periodically, but they want to automatically redact sensitive data (e.g., Social Security numbers) in any new object as soon as it is written to a specific bucket. The redacted version should replace the original object in the same bucket. Which of the following is the most effective and recommended approach?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Set up a Cloud Function triggered by Cloud Storage 'finalize' events. The function calls the DLP API to inspect the object, creates a redacted version, and deletes the original object, replacing it with the redacted data.
Option A is correct: Triggering a Cloud Function on object finalize events, running DLP inspection, and rewriting the object with redacted data is the recommended pattern. Option B is incorrect because DLP cannot modify objects in place; it produces a new artifact. Option C is about retention, not redaction. Option D is about perimeter security and does not address redaction.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Set up a Cloud Function triggered by Cloud Storage 'finalize' events. The function calls the DLP API to inspect the object, creates a redacted version, and deletes the original object, replacing it with the redacted data.
Why this is correct
This is the standard serverless pattern for automatic redaction. Cloud Functions respond to new objects, DLP inspects and redacts, and the function rewrites the object with the redacted content.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Enable a bucket retention policy and use DLP to scan objects and quarantine those with sensitive data by moving them to a different bucket.
Why it's wrong here
Retention policy prevents object deletion or modification, which is opposite to the requirement of redacting and replacing. Quarantine moves data but does not redact.
- ✗
Use Cloud Storage Object Change Notifications to alert a Compute Engine instance that runs a DLP job to modify the object in place.
Why it's wrong here
DLP cannot modify objects in place; it creates a new output. Also, using a persistent VM is less efficient and more complex than Cloud Functions.
- ✗
Use VPC Service Controls to create a secure perimeter around the bucket and then run DLP scans on a schedule.
Why it's wrong here
VPC Service Controls restrict data exfiltration but do not perform redaction. This does not meet the requirement for automatic redaction on write.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
DLP cannot modify objects in place; it creates a new output. Also, using a persistent VM is less efficient and more complex than Cloud Functions.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCSE NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this PCSE question test?
Ensuring data protection — This question tests Ensuring data protection — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Set up a Cloud Function triggered by Cloud Storage 'finalize' events. The function calls the DLP API to inspect the object, creates a redacted version, and deletes the original object, replacing it with the redacted data. — Option A is correct: Triggering a Cloud Function on object finalize events, running DLP inspection, and rewriting the object with redacted data is the recommended pattern. Option B is incorrect because DLP cannot modify objects in place; it produces a new artifact. Option C is about retention, not redaction. Option D is about perimeter security and does not address redaction.
What should I do if I get this PCSE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCSE NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
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.
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