- A
Enable transparent data encryption (TDE) on the database
Why wrong: TDE encrypts data at rest but does not prevent data exfiltration by authorized users or mask data from unauthorized users.
- B
Implement dynamic data masking for columns containing PHI
Dynamic data masking obfuscates sensitive data from non-privileged users, reducing the risk of exposure.
- C
Enable change tracking on the database
Why wrong: Change tracking is used for data synchronization, not for security controls.
- D
Enable Microsoft Defender for SQL on the server
Microsoft Defender for SQL provides threat detection, including alerts for data exfiltration and anomalous access patterns.
- E
Enable auditing on the database
Why wrong: Auditing logs database events but does not actively prevent data exfiltration.
Quick Answer
The correct actions are to enable Dynamic Data Masking for the PHI columns and enable Microsoft Defender for SQL on the server. Dynamic Data Masking directly prevents unauthorized access by obfuscating protected health information in query results for non-privileged users, ensuring that even if a user runs a SELECT statement, they see masked data instead of raw PHI. Microsoft Defender for SQL complements this by providing advanced threat protection that detects anomalous activities—such as SQL injection or unusual data export patterns—which are key indicators of potential data exfiltration. On the DP-300 exam, this pairing tests your understanding of layered security: one control for prevention (masking) and one for detection (Defender). A common trap is choosing only auditing or encryption, which log or protect data at rest but do not actively prevent unauthorized viewing or alert on exfiltration attempts. Remember the mnemonic “Mask to block, Defender to knock”—masking blocks the view, Defender knocks on the door when something suspicious happens.
DP-300 Implement a secure environment Practice Question
This DP-300 practice question tests your understanding of implement a secure environment. 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 a database administrator for a healthcare organization that uses Azure SQL Database to store protected health information (PHI). The compliance team requires that you implement controls to prevent unauthorized access and detect potential data exfiltration. Which TWO actions should you take?
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
Implement dynamic data masking for columns containing PHI
Dynamic data masking (B) limits exposure of PHI by obfuscating sensitive data in query results to non-privileged users, directly preventing unauthorized viewing. Microsoft Defender for SQL (D) provides advanced threat detection and alerts for anomalous activities like SQL injection or data exfiltration attempts, meeting the detection requirement. Together, they address both prevention and detection of unauthorized access and data exfiltration.
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.
- ✗
Enable transparent data encryption (TDE) on the database
Why it's wrong here
TDE encrypts data at rest but does not prevent data exfiltration by authorized users or mask data from unauthorized users.
- ✓
Implement dynamic data masking for columns containing PHI
Why this is correct
Dynamic data masking obfuscates sensitive data from non-privileged users, reducing the risk of exposure.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable change tracking on the database
Why it's wrong here
Change tracking is used for data synchronization, not for security controls.
- ✓
Enable Microsoft Defender for SQL on the server
Why this is correct
Microsoft Defender for SQL provides threat detection, including alerts for data exfiltration and anomalous access patterns.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable auditing on the database
Why it's wrong here
Auditing logs database events but does not actively prevent data exfiltration.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse TDE (encryption at rest) with data masking (protection during use), or assume auditing alone satisfies detection requirements, missing that Defender for SQL provides active threat detection beyond passive logging.
Detailed technical explanation
How to think about this question
Dynamic data masking applies masking rules at query runtime, altering result sets for columns defined with masking functions (e.g., default, email, custom) without modifying the underlying data. Microsoft Defender for SQL uses machine learning and behavioral analytics to baseline normal database activity and trigger security alerts for suspicious patterns, such as brute-force attacks or unusual data transfers. In a healthcare scenario, combining these ensures that even if a low-privilege user queries PHI columns, the data is masked, while Defender detects any attempt to bypass controls or exfiltrate large volumes of data.
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 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Implement a secure environment — study guide chapter
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FAQ
Questions learners often ask
What does this DP-300 question test?
Implement a secure environment — This question tests Implement a secure environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implement dynamic data masking for columns containing PHI — Dynamic data masking (B) limits exposure of PHI by obfuscating sensitive data in query results to non-privileged users, directly preventing unauthorized viewing. Microsoft Defender for SQL (D) provides advanced threat detection and alerts for anomalous activities like SQL injection or data exfiltration attempts, meeting the detection requirement. Together, they address both prevention and detection of unauthorized access and data exfiltration.
What should I do if I get this DP-300 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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Last reviewed: Jun 24, 2026
This DP-300 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 DP-300 exam.
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