The correct configuration is to assign the Microsoft Purview managed identity the db_datareader role and configure the Azure SQL Database firewall to allow Purview IP ranges. This works because Purview uses its own managed identity to authenticate when scanning Azure SQL Database, eliminating the need for stored credentials while satisfying security requirements. The db_datareader role grants read-only access necessary for automatic data classification, and the firewall must permit inbound connections from Purview’s regional IP ranges—or you can enable the “Allow Azure services” toggle as a simpler alternative. On the DP-300 exam, this scenario tests your understanding of managed identity authentication for external services and the specific permissions required for Purview scanning, often appearing as a trap where candidates mistakenly choose a user-assigned identity or forget the firewall step. A common memory tip: think “Read and Reach”—the managed identity needs the db_datareader role to read data, and the firewall must let Purview reach the database.
DP-300 Plan and implement data platform resources Practice Question
This DP-300 practice question tests your understanding of plan and implement data platform resources. 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.
Your organization is implementing Microsoft Purview for data governance. You need to scan an Azure SQL Database to automatically classify sensitive data. The security team requires that the scan use a managed identity and that the data classification be stored in Microsoft Purview. What should you configure on the Azure SQL Database?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Assign the Microsoft Purview managed identity the db_datareader role and configure the firewall to allow Purview IP ranges
Option C is correct because Microsoft Purview uses its own managed identity to authenticate to data sources when scanning. To scan an Azure SQL Database, you must grant Purview's managed identity the `db_datareader` role in the database to allow read access for classification, and you must configure the Azure SQL firewall to allow inbound connections from the Purview IP ranges (or enable 'Allow Azure services and resources to access this server'). This satisfies the security team's requirement to use a managed identity and store classification in Purview.
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 system-assigned managed identity on the database and grant it permissions to access Purview
Why it's wrong here
The database identity is not used for Purview scanning.
✗
Use SQL authentication with a dedicated login and firewall rule
Why it's wrong here
SQL authentication is less secure and not preferred.
✓
Assign the Microsoft Purview managed identity the db_datareader role and configure the firewall to allow Purview IP ranges
Why this is correct
Managed identity and firewall rules enable Purview to scan.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a user-assigned managed identity and assign it to the database
Why it's wrong here
User-assigned identity is not required.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates mistakenly think they need to assign a managed identity to the Azure SQL Database itself (Option A or D), when in fact the scan uses Purview's own managed identity to authenticate to the database, requiring only role assignment and firewall configuration on the database side.
Detailed technical explanation
How to think about this question
Under the hood, Purview's managed identity is an Azure AD service principal that must be granted explicit database-level permissions (e.g., `db_datareader`) via a contained database user mapped to that identity. The firewall rule must allow the Purview service's IP ranges (documented per Azure region) or enable the 'Allow Azure services' toggle, which uses a special 0.0.0.0 rule. A common subtlety is that the Purview managed identity must be the same one used during the scan registration, and if Purview uses a user-assigned managed identity, that identity must be granted the role instead of the system-assigned one.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Plan and implement data platform resources — This question tests Plan and implement data platform resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Assign the Microsoft Purview managed identity the db_datareader role and configure the firewall to allow Purview IP ranges — Option C is correct because Microsoft Purview uses its own managed identity to authenticate to data sources when scanning. To scan an Azure SQL Database, you must grant Purview's managed identity the `db_datareader` role in the database to allow read access for classification, and you must configure the Azure SQL firewall to allow inbound connections from the Purview IP ranges (or enable 'Allow Azure services and resources to access this server'). This satisfies the security team's requirement to use a managed identity and store classification in Purview.
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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