The correct combination to encrypt Azure SQL Database at rest and in transit is Transparent Data Encryption (TDE) and TLS 1.2. TDE performs real-time I/O encryption and decryption of the database, data files, and transaction logs, ensuring all patient data is encrypted at rest without requiring application changes. TLS 1.2, enforced at the connection level, encrypts data in transit between the client and Azure SQL Database, preventing interception during transmission. On the Microsoft Azure Database Administrator Associate DP-300 exam, this scenario tests your understanding of how to meet compliance requirements like HIPAA by layering distinct encryption mechanisms—one for storage and one for network traffic. A common trap is confusing TDE with Always Encrypted, but remember: TDE protects the entire database at rest, while Always Encrypted protects specific columns in transit and at rest. For a quick memory tip, think “TDE for the drive, TLS for the wire.”
DP-300 Plan and implement data platform resources Practice Question
This DP-300 practice question tests your understanding of plan and implement data platform resources. 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 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?
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
Option A is correct because 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
TDE encrypts data at rest, TLS encrypts data in transit.
Related concept
Read the scenario before looking for a memorised answer.
✗
Dynamic data masking and row-level security
Why it's wrong here
Neither provides encryption.
✗
Azure Active Directory authentication and firewall rules
Always Encrypted and transparent data encryption (TDE)
Why it's wrong here
Always Encrypted is for specific columns, not all data at rest.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often 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.
Detailed technical explanation
How to think about this question
TDE uses an AES-256 database encryption key (DEK) stored in the database boot record, which is protected by a server certificate or an asymmetric key in Azure Key Vault. TLS 1.2 ensures that all data packets between the client and SQL Database are encrypted using a cipher suite negotiated during the handshake, preventing man-in-the-middle attacks. A common real-world scenario is a healthcare audit where the auditor requires proof of encryption at rest (via TDE) and encryption in transit (via enforced TLS 1.2 minimum version in the connection string).
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Plan and implement data platform resources — This question tests Plan and implement data platform resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Transparent data encryption (TDE) and TLS 1.2 — Option A is correct because 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.
What should I do if I get this DP-300 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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