Quick Answer
The answer is Row-Level Security (RLS), Always Encrypted, and Dynamic Data Masking. These three features directly help prevent data exfiltration in Azure SQL Database by controlling access and visibility at different layers: RLS restricts which rows a user can see based on group membership or context, Always Encrypted ensures sensitive data remains encrypted at the client side so the database engine never sees plaintext values, and Dynamic Data Masking obfuscates sensitive fields in query results for unauthorized users. On the DP-300 exam, this question tests your understanding of defense-in-depth against unauthorized data extraction, often appearing as a multi-select scenario where you must distinguish between features that prevent exfiltration versus those that merely audit or monitor. A common trap is confusing Transparent Data Encryption (TDE) with Always Encrypted—TDE protects data at rest but does not prevent the database engine from reading plaintext during queries, so it is not an exfiltration prevention feature. Remember the mnemonic “RAD” for Row-level, Always Encrypted, and Dynamic Masking to recall the three core exfiltration blockers.
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.
Which THREE of the following are features that help protect against data exfiltration in Azure SQL Database? (Choose three.)
Always Encrypted
Prevents the database engine from seeing plaintext data.
Dynamic Data Masking (DDM)
Why wrong: Masks data but does not prevent exfiltration.
Transparent Data Encryption (TDE)
Why wrong: Protects data at rest but does not prevent exfiltration.
Azure SQL Database firewall
Limits network access to the database.
Row-Level Security (RLS)
Restricts data access at the row level.
Answer choices
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 correct because it encrypts sensitive data at the client-side, ensuring that the encryption keys are never revealed to the database engine. This prevents even database administrators or attackers with access to the server from reading the plaintext data, directly protecting against data exfiltration.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Always Encrypted
Why this is correct
Prevents the database engine from seeing plaintext data.
Related concept
Read the scenario before looking for a memorised answer.
Dynamic Data Masking (DDM)
Why it's wrong here
Masks data but does not prevent exfiltration.
Transparent Data Encryption (TDE)
Why it's wrong here
Protects data at rest but does not prevent exfiltration.
Azure SQL Database firewall
Why this is correct
Limits network access to the database.
Related concept
Read the scenario before looking for a memorised answer.
Row-Level Security (RLS)
Why this is correct
Restricts data access at the row level.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse Dynamic Data Masking (DDM) with encryption, thinking it prevents data exfiltration, when in fact it only hides data from specific users and does not protect against direct database access or file theft.
Detailed technical explanation
Always Encrypted uses a two-tier key hierarchy: a Column Encryption Key (CEK) protected by a Column Master Key (CMK) stored outside SQL Server (e.g., in Azure Key Vault or Windows Certificate Store). The client driver (e.g., ADO.NET) performs encryption and decryption locally, so the database engine only sees ciphertext. This design ensures that even if the entire Azure SQL Database server is compromised, the encrypted columns remain unreadable without the CMK.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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Implement a secure environment — study guide chapter
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FAQ
Implement a secure environment — This question tests Implement a secure environment — Read the scenario before looking for a memorised answer..
The correct answer is: Always Encrypted — Always Encrypted is correct because it encrypts sensitive data at the client-side, ensuring that the encryption keys are never revealed to the database engine. This prevents even database administrators or attackers with access to the server from reading the plaintext data, directly protecting against data exfiltration.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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