- A
IAM conditions on tables
Why wrong: IAM conditions control access but don't mask data.
- B
Authorized views
Why wrong: Authorized views provide row-level access but not automatic masking.
- C
Column-level security with data masking
Data masking policy tags can automatically redact PII based on user roles.
- D
Cloud DLP API
Why wrong: Cloud DLP is for inspection and de-identification, not real-time masking in queries.
Question 573 of 1,000
PDE Preparing and Using Data for Analysis Practice Question
This PDE practice question tests your understanding of preparing and using data for analysis. 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.
You are migrating a large on-premises data warehouse to BigQuery. The data includes sensitive PII columns that must be masked for certain users. Which BigQuery feature can automatically redact PII in query results based on user roles?
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
✓
Column-level security with data masking
BigQuery column-level security with policy tags and data masking can automatically mask sensitive data based on IAM roles. Authorized views require manual creation. Dynamic data masking is part of column-level security. IAM conditions don't mask data.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
IAM conditions on tables
Why it's wrong here
IAM conditions control access but don't mask data.
- ✗
Authorized views
Why it's wrong here
Authorized views provide row-level access but not automatic masking.
- ✓
Column-level security with data masking
Why this is correct
Data masking policy tags can automatically redact PII based on user roles.
Related concept
CIDR notation defines the prefix length.
- ✗
Cloud DLP API
Why it's wrong here
Cloud DLP is for inspection and de-identification, not real-time masking in queries.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PDE subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Questions learners often ask
What does this PDE question test?
Preparing and Using Data for Analysis — This question tests Preparing and Using Data for Analysis — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Column-level security with data masking — BigQuery column-level security with policy tags and data masking can automatically mask sensitive data based on IAM roles. Authorized views require manual creation. Dynamic data masking is part of column-level security. IAM conditions don't mask data.
What should I do if I get this PDE question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related PDE subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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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