DP-300 Plan and implement data platform resources Practice Question
A healthcare company is required to encrypt all patient data at rest and in transit. They are deploying Azure SQL Database. Which combination of features should they implement to meet this requirement?
⚠ Common exam trap
Many candidates confuse Always Encrypted with a complete encryption solution for both at rest and in transit, but it only encrypts specific columns and does not encrypt the entire transport channel, leaving the connection vulnerable without TLS.
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) and TLS 1.2
Transparent Data Encryption (TDE) encrypts data at rest by performing real-time I/O encryption and decryption of the database, data files, and transaction logs, while TLS 1.2 encrypts data in transit between the client and Azure SQL Database. Together, they satisfy the requirement to encrypt all patient data both 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.
- ✓
Transparent data encryption (TDE) and TLS 1.2
Why this is correct
Transparent data encryption performs real-time encryption and decryption of the database, backups, and transaction logs at rest without application changes, while TLS 1.2 secures data in transit between clients and the server. Together they satisfy the healthcare company's dual requirement for Azure SQL Database.
- ✗
Dynamic data masking and row-level security
Why it's wrong here
Dynamic data masking hides column values in query results and row-level security filters rows by predicate; neither encrypts stored data nor protects data on the wire. They are tempting because both address data exposure to unauthorised users, which is the correct choice when the requirement is limiting what specific users can see rather than cryptographic protection.
- ✗
Microsoft Entra ID authentication and firewall rules
Why it's wrong here
Microsoft Entra ID authentication and firewall rules control who may connect and from where; they do not encrypt stored data or the wire protocol. It is tempting because both are core Azure SQL Database security controls, and they would be correct when the requirement is identity-based access control rather than encryption.
- ✗
Always Encrypted and transparent data encryption (TDE)
Why it's wrong here
TDE encrypts data and backups at rest, while Always Encrypted protects column data from the database engine; neither encrypts the connection itself, so data in transit is unaddressed. It is tempting because both are encryption features, and the pairing would be correct when the requirement covers only data at rest.
Go deeper
Related to this question
Learn chapter
Securing Data at Rest and in Transit
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.
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.
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.