DP-900 Practice Question: Identify considerations for relational data on Azure
This DP-900 practice question tests your understanding of identify considerations for relational data on azure. 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 stores sensitive customer data in Azure SQL Database. They need to encrypt the data at rest and ensure that only authorized applications can decrypt it. Which combination of features should they implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Transparent Data Encryption (TDE) and Always Encrypted
Option C is correct because TDE encrypts the database at rest, and Always Encrypted ensures that only authorized applications with the column encryption key can decrypt sensitive columns. Option A is wrong because row-level security controls access but does not encrypt data. Option B is wrong because dynamic data masking obfuscates data but does not encrypt. Option D is wrong because auditing logs access but does not encrypt.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Row-Level Security (RLS) and Transparent Data Encryption (TDE)
Why it's wrong here
RLS filters rows but does not encrypt; TDE encrypts at rest but does not restrict application decryption.
✗
Azure SQL Database Auditing and Transparent Data Encryption (TDE)
Why it's wrong here
Auditing does not control decryption.
✓
Transparent Data Encryption (TDE) and Always Encrypted
Why this is correct
TDE encrypts the database at rest; Always Encrypted allows client-side encryption and decryption by authorized applications.
DDM masks data but does not encrypt; Always Encrypted encrypts but DDM is not needed.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
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
How to think about this question
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.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
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
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-900 question in full detail.
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-900 subnetting questions on CIDR, address ranges, and subnet selection.
Identify considerations for relational data on Azure — This question tests Identify considerations for relational data on Azure — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Transparent Data Encryption (TDE) and Always Encrypted — Option C is correct because TDE encrypts the database at rest, and Always Encrypted ensures that only authorized applications with the column encryption key can decrypt sensitive columns. Option A is wrong because row-level security controls access but does not encrypt data. Option B is wrong because dynamic data masking obfuscates data but does not encrypt. Option D is wrong because auditing logs access but does not encrypt.
What should I do if I get this DP-900 question wrong?
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-900 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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