- A
Use Cloud Storage with default encryption, bucket policies, and Cloud Audit Logs. For frequent access, use Cloud CDN.
Why wrong: Default encryption is OK but not customer-managed; also no DLP for data classification.
- B
Use Cloud Storage with CMEK, and use Cloud HSM for key storage. Use Cloud Audit Logs. Avoid caching to ensure security.
Why wrong: Cloud HSM may be overkill; caching can be done securely with CDN and does not compromise security; missing DLP.
- C
Use Cloud Storage with SSE-C, bucket policies, and Cloud Audit Logs. Use Cloud Load Balancing for caching.
Why wrong: SSE-C is cumbersome (client manages keys); Cloud Load Balancing is not designed for caching like CDN.
- D
Use Cloud Storage with CMEK, bucket-level IAM, and object ACLs. Use Cloud Data Loss Prevention API to classify data. Enable Cloud Audit Logs. Use Cloud CDN to cache curated datasets.
CMEK ensures customer-controlled encryption; IAM+ACLs give granular access; DLP inspects and classifies; audit logs capture access; CDN caches data for lower latency and cost.
Quick Answer
The correct answer is the combination of Cloud Storage with CMEK, bucket-level IAM, object ACLs, Cloud DLP, Cloud Audit Logs, and Cloud CDN. This configuration satisfies every stated requirement because CMEK, ideally managed via Cloud HSM, provides encryption at rest with customer-managed keys, while HTTPS ensures encryption in transit. Granular access control is achieved by layering bucket-level IAM for broad roles and object ACLs for sensitivity-based restrictions, with Cloud DLP classifying data into public, internal, and confidential tiers. Cloud Audit Logs capture all access to sensitive data for compliance, and Cloud CDN caches frequently accessed curated datasets to minimize egress costs. On the Google Professional Data Engineer exam, this question tests your ability to integrate security services holistically rather than picking a single tool; a common trap is choosing Cloud KMS without CMEK or forgetting that ACLs are needed for object-level control beyond IAM. Memory tip: “CIA + CDN” — CMEK, IAM, ACLs, Audit, plus CDN for cost.
PDE Practice Question: Building and operationalizing data processing systems
This PDE practice question tests your understanding of building and operationalizing data processing systems. 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 company is designing a data lake on Google Cloud. The data lake will store raw, curated, and analytics-ready data. Security requirements include: data must be encrypted at rest and in transit, access must be controlled based on data sensitivity (public, internal, confidential), and all access to sensitive data must be audited. The company also wants to minimize data transfer costs for frequently accessed curated datasets. Which combination of services and configurations best meets these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
Use Cloud Storage with CMEK, bucket-level IAM, and object ACLs. Use Cloud Data Loss Prevention API to classify data. Enable Cloud Audit Logs. Use Cloud CDN to cache curated datasets.
Option D is correct because it combines CMEK for encryption at rest (with Cloud HSM for key management), bucket-level IAM and object ACLs for granular access control based on data sensitivity, Cloud Audit Logs for auditing access to sensitive data, and Cloud CDN to cache curated datasets, reducing data transfer costs for frequently accessed data. This configuration meets all security requirements (encryption at rest and in transit, access control, auditing) while optimizing cost for frequent access.
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 Storage with default encryption, bucket policies, and Cloud Audit Logs. For frequent access, use Cloud CDN.
Why it's wrong here
Default encryption is OK but not customer-managed; also no DLP for data classification.
- ✗
Use Cloud Storage with CMEK, and use Cloud HSM for key storage. Use Cloud Audit Logs. Avoid caching to ensure security.
Why it's wrong here
Cloud HSM may be overkill; caching can be done securely with CDN and does not compromise security; missing DLP.
- ✗
Use Cloud Storage with SSE-C, bucket policies, and Cloud Audit Logs. Use Cloud Load Balancing for caching.
Why it's wrong here
SSE-C is cumbersome (client manages keys); Cloud Load Balancing is not designed for caching like CDN.
- ✓
Use Cloud Storage with CMEK, bucket-level IAM, and object ACLs. Use Cloud Data Loss Prevention API to classify data. Enable Cloud Audit Logs. Use Cloud CDN to cache curated datasets.
Why this is correct
CMEK ensures customer-controlled encryption; IAM+ACLs give granular access; DLP inspects and classifies; audit logs capture access; CDN caches data for lower latency and cost.
Clue confirmation
The clue words "best", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that caching (Cloud CDN) is inherently insecure or that it cannot be used with sensitive data, but in reality, Cloud CDN can be secured with signed URLs, IAM, and encryption, and it is the correct way to reduce data transfer costs for frequently accessed data.
Detailed technical explanation
How to think about this question
Cloud CDN caches content from Cloud Storage buckets at Google's edge locations, reducing egress costs for repeated requests by serving cached data instead of fetching from the bucket each time. CMEK with Cloud HSM allows the customer to control and audit key usage via Cloud KMS, meeting strict compliance requirements. Object ACLs provide fine-grained access control at the object level, complementing bucket-level IAM for sensitivity-based access.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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.
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FAQ
Questions learners often ask
What does this PDE question test?
Building and operationalizing data processing systems — This question tests Building and operationalizing data processing systems — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud Storage with CMEK, bucket-level IAM, and object ACLs. Use Cloud Data Loss Prevention API to classify data. Enable Cloud Audit Logs. Use Cloud CDN to cache curated datasets. — Option D is correct because it combines CMEK for encryption at rest (with Cloud HSM for key management), bucket-level IAM and object ACLs for granular access control based on data sensitivity, Cloud Audit Logs for auditing access to sensitive data, and Cloud CDN to cache curated datasets, reducing data transfer costs for frequently accessed data. This configuration meets all security requirements (encryption at rest and in transit, access control, auditing) while optimizing cost for frequent access.
What should I do if I get this PDE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best", "minimum / minimize". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 30, 2026
This PDE 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 PDE exam.
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