Always Encrypted is the correct choice because it encrypts sensitive columns in Azure SQL Database both at rest and in transit between the application and the database, ensuring that encryption keys are never exposed to the database engine. This feature works by keeping data encrypted throughout the entire data path, including during query execution, so even the database engine itself cannot view the plaintext values. On the Microsoft Azure Database Administrator Associate DP-300 exam, this question tests your understanding of column-level encryption versus other options like Transparent Data Encryption (TDE), which only protects data at rest but not in transit or during query processing. A common trap is confusing TDE with Always Encrypted, so remember that TDE encrypts the entire database at the storage layer, while Always Encrypted protects specific columns end-to-end. A helpful memory tip: think of Always Encrypted as “always encrypted everywhere” — from the application to the database and back, with keys held client-side.
DP-300 Implement a secure environment Practice Question
This DP-300 practice question tests your understanding of implement a secure environment. 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.
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?
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.
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.
✗
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.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that 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.
Detailed technical explanation
How to think about this question
Always Encrypted uses client-side encryption where the driver (e.g., ODBC or JDBC with Column Encryption Setting=enabled) encrypts sensitive columns before sending data to SQL Server, and decrypts results after retrieval. The database engine never has access to the encryption keys, which are stored in an external key store like Azure Key Vault or Windows Certificate Store. This ensures that even database administrators or attackers with full database access cannot view the plaintext data.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Implement a secure environment — This question tests Implement a secure environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
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.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Refer to the exhibit. You run these commands in an Azure SQL Database. What is the result?
easy
A.The user is created but not granted any permissions.
B.The commands fail because Entra ID users cannot be created in Azure SQL Database.
C.A SQL Server authentication user is created and granted read access.
✓ D.A Microsoft Entra ID user is created and granted read access to the database.
Why D: The commands create a user in an Azure SQL Database mapped to a Microsoft Entra ID (formerly Azure AD) identity. The CREATE USER statement with FROM EXTERNAL PROVIDER creates a user that corresponds to an Entra ID user or group. The ALTER ROLE statement then adds this user to the db_datareader database role, granting read access to all tables and views. Therefore, option D correctly describes the outcome: a Microsoft Entra ID user is created and granted read access.
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Question Discussion
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