- A
Retention policy
Why wrong: Retention policies focus on retaining or deleting data based on age, not on detecting and preventing sharing of sensitive content in real-time.
- B
Data Loss Prevention (DLP) policy
DLP policies can detect sensitive information such as credit card numbers and enforce actions like blocking the email and displaying a policy tip to the user.
- C
Sensitivity label
Why wrong: Sensitivity labels manually or automatically classify data and apply protection, but they do not automatically block sharing based on content detection nor show policy tips.
- D
Information Barriers
Why wrong: Information Barriers restrict communication and collaboration between specific user groups to avoid conflicts of interest, but they do not inspect content for sensitive data.
MS-900 Practice Question: Describe security, compliance, privacy, and trust in Microsoft 365
This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. 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 wants to prevent users from sharing documents that contain credit card numbers via email. When a user attempts to share such a document, they should see a policy tip explaining the restriction and the share should be blocked. Which Microsoft Purview solution should the compliance team configure?
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
Data Loss Prevention (DLP) policy
Microsoft Purview Data Loss Prevention (DLP) policies are specifically designed to detect sensitive information types—such as credit card numbers—in documents and emails, and then automatically block sharing while displaying a policy tip to the user. This matches the requirement exactly: DLP can inspect content for credit card patterns using built-in sensitive info types (e.g., Credit Card Number), enforce actions like 'Block' with an overridable policy tip, and apply to Exchange Online, SharePoint, OneDrive, and Teams. Retention policies only manage data lifecycle, not content-based blocking.
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.
- ✗
Retention policy
Why it's wrong here
Retention policies focus on retaining or deleting data based on age, not on detecting and preventing sharing of sensitive content in real-time.
- ✓
Data Loss Prevention (DLP) policy
Why this is correct
DLP policies can detect sensitive information such as credit card numbers and enforce actions like blocking the email and displaying a policy tip to the user.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Sensitivity label
Why it's wrong here
Sensitivity labels manually or automatically classify data and apply protection, but they do not automatically block sharing based on content detection nor show policy tips.
- ✗
Information Barriers
Why it's wrong here
Information Barriers restrict communication and collaboration between specific user groups to avoid conflicts of interest, but they do not inspect content for sensitive data.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Microsoft often tests the distinction between DLP (which inspects content for sensitive data and blocks actions) and Sensitivity labels (which apply classification and protection but do not natively scan for specific data patterns like credit card numbers to enforce blocking with policy tips).
Trap categories for this question
Command / output trap
Sensitivity labels manually or automatically classify data and apply protection, but they do not automatically block sharing based on content detection nor show policy tips.
Detailed technical explanation
How to think about this question
Under the hood, DLP policies in Microsoft Purview use the Microsoft 365 data classification service, which includes over 200 built-in sensitive information types (e.g., Credit Card Number defined by regex and checksum validation per Luhn algorithm). When a user attempts to share a document via email (Exchange Online) or a cloud attachment (OneDrive/SharePoint), the DLP engine inspects the content in transit, matches the pattern, and enforces the configured action—such as blocking the message and showing a policy tip via the Exchange Transport Agent or SharePoint Online DLP integration. A subtle behavior: DLP can also apply to Teams messages and endpoints, but the policy tip is only shown in supported clients like Outlook on the web or the SharePoint sharing dialog.
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.
What to study next
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FAQ
Questions learners often ask
What does this MS-900 question test?
Describe security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Data Loss Prevention (DLP) policy — Microsoft Purview Data Loss Prevention (DLP) policies are specifically designed to detect sensitive information types—such as credit card numbers—in documents and emails, and then automatically block sharing while displaying a policy tip to the user. This matches the requirement exactly: DLP can inspect content for credit card patterns using built-in sensitive info types (e.g., Credit Card Number), enforce actions like 'Block' with an overridable policy tip, and apply to Exchange Online, SharePoint, OneDrive, and Teams. Retention policies only manage data lifecycle, not content-based blocking.
What should I do if I get this MS-900 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.
About these practice questions
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Last reviewed: Jun 30, 2026
This MS-900 practice question is part of Courseiva's free Microsoft 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 MS-900 exam.
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