Quick Answer
The correct answer is row-level security (RLS) with a security policy because it restricts data access at the row level based on the user’s Microsoft Entra ID role, ensuring that only authorized users see specific rows of sensitive customer data while all access is logged for auditing. This solution works by creating a security predicate function that filters rows based on the calling user’s Entra ID context, and it integrates directly with a dedicated SQL pool in Azure Synapse Analytics. On the DP-203 exam, this scenario tests your ability to distinguish between data-level controls: RLS controls which rows a user can read, whereas column-level security hides entire columns, dynamic data masking only obfuscates values, and Azure RBAC governs resource management, not in-pool data access. A common trap is confusing RLS with dynamic data masking, but remember that masking still allows the user to see the row—RLS blocks it entirely. Memory tip: “RLS rows, CLS columns, DDM masks, RBAC tasks.”
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and data processing. 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 have an Azure Synapse Analytics dedicated SQL pool that stores sensitive customer data. You need to ensure that only users with a specific Microsoft Entra ID role can access the data, and all access must be logged for auditing. What should you implement?
Dynamic data masking
Why wrong: Dynamic data masking hides data but does not prevent access.
Azure RBAC at the SQL pool level
Why wrong: Azure RBAC controls management operations, not data access.
Row-level security (RLS) with a security policy
RLS restricts row access based on user context, and can be tied to Microsoft Entra ID roles.
Column-level security
Why wrong: Column-level security restricts access to specific columns, not rows.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Row-level security (RLS) with a security policy
Option B is correct because row-level security (RLS) controls access at the row level based on user context, and it can be integrated with Microsoft Entra ID roles. Option A (column-level security) restricts columns, not rows. Option C (dynamic data masking) obfuscates data but does not restrict access. Option D (Azure RBAC) controls resource management, not data access inside the SQL pool.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Dynamic data masking
Why it's wrong here
Dynamic data masking hides data but does not prevent access.
Azure RBAC at the SQL pool level
Why it's wrong here
Azure RBAC controls management operations, not data access.
Row-level security (RLS) with a security policy
Why this is correct
RLS restricts row access based on user context, and can be tied to Microsoft Entra ID roles.
Related concept
CIDR notation defines the prefix length.
Column-level security
Why it's wrong here
Column-level security restricts access to specific columns, not rows.
Common exam traps
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
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
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DP-203 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — CIDR notation defines the prefix length..
The correct answer is: Row-level security (RLS) with a security policy — Option B is correct because row-level security (RLS) controls access at the row level based on user context, and it can be integrated with Microsoft Entra ID roles. Option A (column-level security) restricts columns, not rows. Option C (dynamic data masking) obfuscates data but does not restrict access. Option D (Azure RBAC) controls resource management, not data access inside the SQL pool.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DP-203 subnetting questions on CIDR, address ranges, and subnet selection.
CIDR notation defines the prefix length.
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Last reviewed: Jun 21, 2026
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