DP-300 Implement a secure environment Practice Question
Your organization uses Azure SQL Database and wants to implement a defense-in-depth strategy. You have already enabled Transparent Data Encryption (TDE) and firewall rules. You need to add an additional layer of security that protects against unauthorized access to the physical storage files (e.g., if someone gains access to the storage account). What should you enable?
⚠ Common exam trap
Many candidates confuse TDE with infrastructure encryption, assuming TDE alone protects against physical storage access, but TDE only encrypts database pages, not the underlying storage infrastructure, which is why double encryption is needed for defense-in-depth.
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
✓
Infrastructure encryption (double encryption) using platform-managed keys
Infrastructure encryption (double encryption) using platform-managed keys adds a second layer of encryption at the storage infrastructure level, below the TDE layer. This protects data at rest even if the physical storage files (e.g., Azure Storage blobs) are accessed directly, because the storage infrastructure itself is encrypted with a separate, platform-managed key. This fulfills the defense-in-depth requirement for protecting against unauthorized access to physical storage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Infrastructure encryption (double encryption) using platform-managed keys
Why this is correct
Adds a second layer of encryption at the storage infrastructure level.
- ✗
Dynamic Data Masking
Why it's wrong here
Does not encrypt data.
- ✗
Microsoft Defender for SQL
Why it's wrong here
Threat detection, not encryption.
- ✗
Always Encrypted with secure enclaves
Why it's wrong here
Protects data in use, not storage-level encryption.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
Key term
Transparent Data Encryption
Transparent Data Encryption is a security feature that automatically encrypts data written to a database and decrypts it when read, without requiring any changes to the application.
Key term
Azure SQL Performance Tuning
Azure SQL Performance Tuning is the process of optimizing the speed and efficiency of queries and database operations in Microsoft Azure SQL Database or SQL Managed Instance to reduce latency and improve throughput.
About these practice questions
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-300 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-300 exam.