DP-300 Implement a secure environment Practice Question
You need to encrypt sensitive columns in an Azure SQL Database table so that data is encrypted at rest and in transit between the application and database. Which feature should you use?
⚠ Common exam trap
Candidates often confuse Transparent Data Encryption (TDE) as covering both at-rest and in-transit encryption, but TDE only encrypts data at rest on disk, not during network transmission or while in memory.
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
✓
Always Encrypted
Always Encrypted is the correct choice because it encrypts sensitive data both at rest in the database and in transit between the application and the database. It ensures that encryption keys are never revealed to the database engine, so data remains encrypted throughout the entire data path, including during query execution. This meets the requirement for encryption at rest and in transit.
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
Why it's wrong here
Row-Level Security controls access to rows based on user, but does not encrypt data.
- ✗
Transparent Data Encryption (TDE)
Why it's wrong here
TDE encrypts the entire database at rest, not specific columns, and does not protect data in transit.
- ✗
Dynamic Data Masking
Why it's wrong here
Dynamic Data Masking obfuscates data but does not encrypt it.
- ✓
Always Encrypted
Why this is correct
Always Encrypted encrypts column data at rest and in transit, with client-side encryption keys.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
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.
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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.