The correct approach is to create a custom scan rule in Microsoft Purview and configure auto-labeling, as this directly enables the data classification rule to scan Azure Data Lake Storage for personally identifiable information (PII) like email addresses and then automatically apply a sensitivity label. Microsoft Purview’s built-in sensitive data types allow you to define custom patterns for PII, and its auto-labeling capability ensures that once the scan identifies matching data, the label is applied without manual intervention. On the Microsoft Cybersecurity Architect exam, this question tests your understanding of Purview’s native classification engine versus other Azure services; a common trap is confusing Purview’s data governance role with Azure Policy (which enforces compliance rules but does not scan content) or Microsoft Defender for Cloud (which focuses on security posture). Remember the key distinction: Purview scans and labels data, while Azure Policy governs resource configuration. A useful memory tip is “Scan and Stamp in Purview, not Policy or Defender”—if you need to find and tag PII in storage, Purview’s custom scan rules with auto-labeling are the direct path.
SC-100 Practice Question: Design security solutions for applications and data
This SC-100 practice question tests your understanding of design security solutions for applications and 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.
Your company uses Microsoft Purview to manage data governance. You need to create a data classification rule that scans Azure Data Lake Storage for personally identifiable information (PII) such as email addresses. The rule must also apply a sensitivity label automatically. Which approach should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a custom scan rule in Microsoft Purview and configure auto-labeling.
Option C is correct because Microsoft Purview has built-in scan rules for sensitive data types and can auto-label. Option A is wrong because Azure Policy is for compliance, not scanning. Option B is wrong because Microsoft Defender for Cloud is for security posture. Option D is wrong because custom Power Automate flows are not the primary method for classification.
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 an Azure Policy to detect and label PII.
Why it's wrong here
Azure Policy is for resource compliance, not data scanning.
✓
Create a custom scan rule in Microsoft Purview and configure auto-labeling.
Why this is correct
Purview scans data and can auto-apply sensitivity labels.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a Power Automate flow to scan files and apply labels.
Why it's wrong here
Power Automate is not the primary tool for classification at scale.
✗
Use Microsoft Defender for Cloud to scan for PII.
Why it's wrong here
Defender for Cloud is for security posture, not data scanning.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-100 question in full detail.
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design security solutions for applications and data — This question tests Design security solutions for applications and data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a custom scan rule in Microsoft Purview and configure auto-labeling. — Option C is correct because Microsoft Purview has built-in scan rules for sensitive data types and can auto-label. Option A is wrong because Azure Policy is for compliance, not scanning. Option B is wrong because Microsoft Defender for Cloud is for security posture. Option D is wrong because custom Power Automate flows are not the primary method for classification.
What should I do if I get this SC-100 question wrong?
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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