Quick Answer
The correct answer is column-level security using GRANT, as this feature in Azure Synapse Analytics allows precise access control by restricting users to specific columns within a table through GRANT statements on those columns. Unlike row-level security, which filters entire rows based on predicates, or dynamic data masking, which only obfuscates data at query time without preventing access, column-level security actually denies access to sensitive columns unless explicitly granted. On the Microsoft Azure Data Engineer Associate DP-203 exam, this concept often appears in scenario-based questions where you must choose between masking, filtering, or direct permission control—a common trap is confusing dynamic data masking with true access restriction. Remember that GRANT on columns is a permission-level control, not a runtime transformation. Memory tip: think “GRANT column = gatekeeper,” while masking is just a “blur filter.”
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.
An organization is using Azure Synapse Analytics and wants to implement column-level security to restrict access to sensitive columns. Which feature should they use?
Dynamic data masking
Why wrong: Dynamic data masking masks data but does not prevent users from seeing the masked values.
Azure Purview
Why wrong: Azure Purview is a data governance service, not for column-level access control.
Column-level security using GRANT
Column-level security allows you to restrict access to specific columns via GRANT statements.
Row-level security
Why wrong: Row-level security restricts rows, not columns.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Column-level security using GRANT
Option D is correct because column-level security in Azure Synapse Analytics uses GRANT statements on specific columns. Option A is wrong because row-level security filters rows, not columns. Option B is wrong because dynamic data masking masks data at query time but does not restrict access. Option C is wrong because Azure Purview is for governance, not access control.
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 masks data but does not prevent users from seeing the masked values.
Azure Purview
Why it's wrong here
Azure Purview is a data governance service, not for column-level access control.
Column-level security using GRANT
Why this is correct
Column-level security allows you to restrict access to specific columns via GRANT statements.
Related concept
CIDR notation defines the prefix length.
Row-level security
Why it's wrong here
Row-level security restricts rows, not columns.
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: Column-level security using GRANT — Option D is correct because column-level security in Azure Synapse Analytics uses GRANT statements on specific columns. Option A is wrong because row-level security filters rows, not columns. Option B is wrong because dynamic data masking masks data at query time but does not restrict access. Option C is wrong because Azure Purview is for governance, not access control.
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.
About these practice questions
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Same concept, more angles
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. You need to implement column-level security in Azure Synapse Analytics to restrict access to salary information. Only users with the 'HRManager' role should see salary columns. Which feature should you use?
easyWhy C: Option A is correct because column-level security (CLS) in Azure Synapse Analytics uses GRANT on specific columns. Option B is wrong because row-level security filters rows, not columns. Option C is wrong because dynamic data masking obfuscates data but does not restrict access. Option D is wrong because Azure Purview is a governance tool, not a security enforcement mechanism.
Last reviewed: Jun 21, 2026
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