The answer is a sensitive info type for credit card numbers, a DLP policy, and policy tips to notify users of policy violations. These three Microsoft Purview DLP components work together to block credit card sharing in email: the sensitive info type detects the credit card pattern, the DLP policy enforces the rule to block or restrict the email, and policy tips provide real-time user notification to prevent accidental sharing. On the Microsoft Cybersecurity Architect exam, this tests your understanding that DLP requires both detection and enforcement—retention labels and auto-labeling are common traps because they handle classification and retention, not active blocking. A key memory tip is the “Detect, Enforce, Notify” triad: without the sensitive info type, the policy has nothing to scan; without the DLP policy, no action occurs; without policy tips, users get no warning. Remember, policy tips are the user-facing guardrail, not just a compliance label.
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. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 implementing Microsoft Purview to protect sensitive data in Microsoft 365. They need to prevent users from sharing credit card numbers via email. Which THREE components must be configured? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a sensitive info type for credit card numbers
A sensitive info type for credit card numbers (Option A) is needed to detect the data. A DLP policy (Option C) enforces the rule. A policy tip (Option E) notifies users about the policy. Option B is wrong because retention labels are for retention, not prevention. Option D is wrong because auto-labeling applies labels, but DLP policies are needed to block sharing.
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 auto-labeling policy for credit card data
Why it's wrong here
Auto-labeling applies labels but does not block sharing
✗
Create a retention label for credit card data
Why it's wrong here
Retention labels manage data retention, not prevention of sharing
✓
Create a sensitive info type for credit card numbers
Why this is correct
Sensitive info types are used to detect credit card numbers in content
Related concept
Read the scenario before looking for a memorised answer.
✓
Create a Data Loss Prevention (DLP) policy that blocks sharing
Why this is correct
DLP policies enforce actions like blocking when sensitive data is detected
Related concept
Read the scenario before looking for a memorised answer.
✓
Configure policy tips to notify users of policy violations
Why this is correct
Policy tips provide real-time warnings to users when they attempt to share sensitive data
Related concept
Read the scenario before looking for a memorised answer.
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 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.
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 sensitive info type for credit card numbers — A sensitive info type for credit card numbers (Option A) is needed to detect the data. A DLP policy (Option C) enforces the rule. A policy tip (Option E) notifies users about the policy. Option B is wrong because retention labels are for retention, not prevention. Option D is wrong because auto-labeling applies labels, but DLP policies are needed to block sharing.
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.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Your company uses Microsoft Purview Data Loss Prevention (DLP) to protect sensitive data. You need to prevent users from sharing credit card numbers via email in Outlook on the web. The policy should notify users when they try to send such data and allow them to override with a business justification. What should you configure?
medium
A.Create a DLP policy with the action 'Audit only' for credit card numbers
✓ B.Create a DLP policy with the action 'Block with override' and enable 'Business justification'
C.Create a DLP policy that encrypts emails containing credit card numbers
D.Create a DLP policy with the action 'Block' for credit card numbers
Why B: Option C is correct because DLP policies can have rules that detect sensitive info types like credit card numbers, and the action 'Block with override' allows users to override with justification. Option A is wrong because 'Block' without override is too restrictive. Option B is wrong because 'Audit only' does not block. Option D is wrong because encryption alone does not block.
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Question Discussion
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