- A
Create a single bucket with folders for each zone, and use IAM conditions to restrict access
Why wrong: IAM conditions can be used but separate buckets are cleaner and recommended.
- B
Use Cloud Storage lifecycle rules to move objects between zones
Why wrong: Lifecycle rules move objects but do not control access.
- C
Use a single bucket and rely on object ACLs
Why wrong: ACLs are legacy and not recommended; IAM is preferred.
- D
Create three separate buckets, one per zone, and assign IAM roles per bucket
Separate buckets provide clear isolation and simpler IAM management.
Question 421 of 1,000
PDE Storing the Data Practice Question
This PDE practice question tests your understanding of storing the data. 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 company is designing a data lake on Cloud Storage with three zones: raw, curated, and processed. They need to enforce data governance by restricting access to each zone using IAM. Which approach should they take?
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
✓
Create three separate buckets, one per zone, and assign IAM roles per bucket
Option D is correct because Cloud Storage buckets are the fundamental access boundary for IAM policies. By creating three separate buckets (raw, curated, processed), you can assign distinct IAM roles (e.g., roles/storage.objectViewer, roles/storage.objectAdmin) per bucket, ensuring that users or service accounts only have access to the specific zone they are authorized for. This approach aligns with the principle of least privilege and avoids the complexity and limitations of IAM conditions or object-level ACLs.
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 single bucket with folders for each zone, and use IAM conditions to restrict access
Why it's wrong here
IAM conditions can be used but separate buckets are cleaner and recommended.
- ✗
Use Cloud Storage lifecycle rules to move objects between zones
Why it's wrong here
Lifecycle rules move objects but do not control access.
- ✗
Use a single bucket and rely on object ACLs
Why it's wrong here
ACLs are legacy and not recommended; IAM is preferred.
- ✓
Create three separate buckets, one per zone, and assign IAM roles per bucket
Why this is correct
Separate buckets provide clear isolation and simpler IAM management.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that folders within a single bucket can serve as effective security boundaries, but in Cloud Storage, folders are just a naming convention (prefixes) and do not provide native access control isolation without complex IAM conditions or ACLs.
Detailed technical explanation
How to think about this question
Under the hood, Cloud Storage IAM roles are evaluated at the bucket level, and granting access to a bucket implicitly grants access to all objects within it unless object-level ACLs override (which is discouraged). Separate buckets allow you to use uniform bucket-level access, which disables ACLs and enforces IAM-only permissions, simplifying audit logs and reducing the attack surface. In a real-world scenario, a data lake might have thousands of objects per zone; using separate buckets ensures that a misconfigured IAM condition on a single bucket cannot accidentally expose curated or processed data to raw-zone users.
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.
- →
Storing the Data — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this PDE question test?
Storing the Data — This question tests Storing the Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create three separate buckets, one per zone, and assign IAM roles per bucket — Option D is correct because Cloud Storage buckets are the fundamental access boundary for IAM policies. By creating three separate buckets (raw, curated, processed), you can assign distinct IAM roles (e.g., roles/storage.objectViewer, roles/storage.objectAdmin) per bucket, ensuring that users or service accounts only have access to the specific zone they are authorized for. This approach aligns with the principle of least privilege and avoids the complexity and limitations of IAM conditions or object-level ACLs.
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.
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: Jul 4, 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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