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.
A retail company uses Azure SQL Database for its inventory system. The database stores sensitive customer information that must be encrypted at rest to comply with data protection regulations. Which feature should they enable?
Dynamic Data Masking
Why wrong: Data masking hides data from users, but does not encrypt it.
Always Encrypted
Why wrong: Always Encrypted encrypts specific columns, but TDE is the standard for at-rest encryption.
Azure Information Protection
Why wrong: Information Protection is for documents and emails, not database encryption.
Transparent Data Encryption (TDE)
TDE encrypts the entire database at rest.
Answer choices
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)
Option B is correct because Transparent Data Encryption (TDE) encrypts data at rest in Azure SQL Database. Option A (Always Encrypted) protects sensitive data in transit and at rest but is more for column-level encryption. Option C (Dynamic Data Masking) obfuscates data from non-privileged users. Option D (Azure Information Protection) is for file-level protection.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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
Data masking hides data from users, but does not encrypt it.
Always Encrypted
Why it's wrong here
Always Encrypted encrypts specific columns, but TDE is the standard for at-rest encryption.
Azure Information Protection
Why it's wrong here
Information Protection is for documents and emails, not database encryption.
Transparent Data Encryption (TDE)
Why this is correct
TDE encrypts the entire database at rest.
Related concept
Authentication checks who the user is.
Common exam traps
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DP-900 questions on access control and AAA configuration.
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FAQ
Identify considerations for relational data on Azure — This question tests Identify considerations for relational data on Azure — Authentication checks who the user is..
The correct answer is: Transparent Data Encryption (TDE) — Option B is correct because Transparent Data Encryption (TDE) encrypts data at rest in Azure SQL Database. Option A (Always Encrypted) protects sensitive data in transit and at rest but is more for column-level encryption. Option C (Dynamic Data Masking) obfuscates data from non-privileged users. Option D (Azure Information Protection) is for file-level protection.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DP-900 questions on access control and AAA configuration.
Authentication checks who the user is.
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Last reviewed: Jun 20, 2026
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