SC-100 Practice Question: Design solutions that align with security best practices and priorities
This SC-100 practice question tests your understanding of design solutions that align with security best practices and priorities. 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 classify and label sensitive data. The data protection team needs to automatically apply a 'Confidential' label to documents that contain a custom sensitive info type for employee IDs. Which should you create?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A custom sensitive information type and an auto-labeling policy
To automatically apply a 'Confidential' label based on the presence of a custom sensitive info type (employee IDs), you need both a custom sensitive information type (SIT) to define the pattern and an auto-labeling policy to trigger the label application. The auto-labeling policy uses the SIT to scan documents and automatically applies the specified sensitivity label when a match is found. This is the only option that combines the detection mechanism with automated labeling.
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.
✗
A trainable classifier
Why it's wrong here
Trainable classifiers use ML to identify content, not custom patterns.
✗
A sensitivity label
Why it's wrong here
A sensitivity label defines the classification but does not include detection logic.
✗
A retention label
Why it's wrong here
Retention labels manage data lifecycle, not sensitivity classification.
✓
A custom sensitive information type and an auto-labeling policy
Why this is correct
Custom SIT detects the employee ID pattern, and auto-labeling policy applies the label automatically.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the role of a sensitivity label (which is just the label definition) with the auto-labeling policy (which provides the detection and automation), leading them to select only the sensitivity label without the necessary policy.
Detailed technical explanation
How to think about this question
A custom sensitive information type is defined using an XML rule package that specifies patterns, keywords, and proximity requirements, which is then published to the Microsoft 365 compliance center. The auto-labeling policy (for data at rest or in transit) integrates with the Microsoft 365 unified labeling client and uses the exact match data matching (EDM) or pattern-based SIT to scan SharePoint, OneDrive, and Exchange, applying the sensitivity label via the Azure Information Protection (AIP) engine. A subtle behavior is that auto-labeling policies for data at rest can take up to 24 hours to process, and they require the sensitivity label to be published to users first.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-100 question in full detail.
Design solutions that align with security best practices and priorities — This question tests Design solutions that align with security best practices and priorities — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A custom sensitive information type and an auto-labeling policy — To automatically apply a 'Confidential' label based on the presence of a custom sensitive info type (employee IDs), you need both a custom sensitive information type (SIT) to define the pattern and an auto-labeling policy to trigger the label application. The auto-labeling policy uses the SIT to scan documents and automatically applies the specified sensitivity label when a match is found. This is the only option that combines the detection mechanism with automated labeling.
What should I do if I get this SC-100 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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Question Discussion
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