- A
BigLake tables over Cloud Storage
BigLake provides fine-grained access control (column-level and row-level security) via BigQuery, along with a unified lakehouse.
- B
BigQuery external tables reading from GCS
Why wrong: External tables do not support BigQuery column-level or row-level security natively.
- C
Dataproc with Spark SQL
Why wrong: Dataproc is a managed Spark service; it does not provide the native BigQuery governance features.
- D
Cloud Storage with IAM and VPC Service Controls
Why wrong: IAM and VPC SC provide network and bucket-level security, not column/row-level security on queries.
Question 339 of 1,000
PDE Storing the Data Practice Question
This PDE practice question tests your understanding of storing the data. 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 company wants to build a data lake on Cloud Storage for raw, curated, and processed data zones. They need to enforce data governance including column-level security and row-level filtering for BigQuery queries. Which solution should they use?
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
✓
BigLake tables over Cloud Storage
BigLake tables provide a unified governance layer over Cloud Storage data, enabling fine-grained access control such as column-level security and row-level filtering directly on BigQuery queries. This is achieved by integrating BigQuery's access control policies with the external data stored in GCS, without needing to move data into BigQuery native storage. The other options either lack these granular security features or require complex workarounds.
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.
- ✓
BigLake tables over Cloud Storage
Why this is correct
BigLake provides fine-grained access control (column-level and row-level security) via BigQuery, along with a unified lakehouse.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
BigQuery external tables reading from GCS
Why it's wrong here
External tables do not support BigQuery column-level or row-level security natively.
- ✗
Dataproc with Spark SQL
Why it's wrong here
Dataproc is a managed Spark service; it does not provide the native BigQuery governance features.
- ✗
Cloud Storage with IAM and VPC Service Controls
Why it's wrong here
IAM and VPC SC provide network and bucket-level security, not column/row-level security on queries.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google often tests the misconception that BigQuery external tables (Option B) can support the same fine-grained security as BigLake, but they cannot because external tables lack the integrated policy engine for column and row-level controls.
Detailed technical explanation
How to think about this question
BigLake tables use a BigQuery connection and a Cloud Resource Manager (CRM) binding to apply row-level security via row access policies and column-level security via column-level access control (CLAC) on the external table. Under the hood, BigLake leverages the BigQuery Storage API to read Parquet, Avro, or ORC files from GCS, and applies the security policies at query time by rewriting the SQL to include filters and column masks. In a real-world scenario, a healthcare company could use BigLake to restrict access to patient PII columns (e.g., SSN) and filter rows by department, all while keeping the raw data in GCS for cost efficiency.
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: BigLake tables over Cloud Storage — BigLake tables provide a unified governance layer over Cloud Storage data, enabling fine-grained access control such as column-level security and row-level filtering directly on BigQuery queries. This is achieved by integrating BigQuery's access control policies with the external data stored in GCS, without needing to move data into BigQuery native storage. The other options either lack these granular security features or require complex workarounds.
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.
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Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jul 4, 2026
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