Question 919 of 919
DP-300 Implement a secure environment Practice Question
Which THREE security features are available in Azure SQL Database to protect data at rest?
⚠ Common exam trap
It's easy for candidates to confuse Dynamic Data Masking or Row-Level Security with encryption at rest, but these features do not encrypt stored data; they only control data visibility or output masking, which is a common misconception tested in DP-300.
Answer choices
Why each option matters
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) with customer-managed keys
Transparent Data Encryption (TDE) with customer-managed keys (Option A) protects data at rest by encrypting the database files and backups using a key stored in Azure Key Vault, giving the customer full control over key rotation and revocation. TDE with service-managed keys (Option C) also encrypts data at rest but uses a key managed by Azure, which is simpler but offers less control. Always Encrypted with secure enclaves (Option E) protects sensitive data at rest by encrypting columns with keys that are never revealed to the database engine, and the secure enclave allows computations on encrypted data, ensuring data remains encrypted even during processing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Transparent Data Encryption (TDE) with customer-managed keys
Why this is correct
Encrypts data at rest with customer-controlled keys.
- ✗
Dynamic Data Masking
Why it's wrong here
Masks data in query results, not at rest.
- ✓
Transparent Data Encryption (TDE) with service-managed keys
Why this is correct
Encrypts data at rest.
- ✗
Row-Level Security
Why it's wrong here
Restricts row access, not encryption.
- ✓
Always Encrypted with secure enclaves
Why this is correct
Protects sensitive data at rest and in use.
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Last reviewed: Jun 24, 2026
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