The answer is to define a column master key and column encryption key in the database, and update the connection string to include 'Column Encryption Setting=enabled'. This is correct because Always Encrypted protects sensitive data at the column level by encrypting it on the client side before it ever reaches Azure SQL Database, ensuring that even database administrators cannot view the plaintext values. The column master key protects the encryption keys themselves, while the column encryption key actually encrypts the data; the client-side driver, enabled by the connection string setting, handles the decryption transparently for authorized queries. On the AZ-500 exam, this question tests your ability to distinguish Always Encrypted from other Azure SQL security features like Transparent Data Encryption, which encrypts at rest, or Dynamic Data Masking, which only hides results. A common trap is confusing client-side encryption with server-side encryption, so remember that Always Encrypted keeps the keys on the client, not the server. Memory tip: "Client controls the keys, connection string sets the keys free."
AZ-500 Secure compute, storage, and databases Practice Question
This AZ-500 practice question tests your understanding of secure compute, storage, and databases. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Your company uses Azure SQL Database. You need to ensure that all queries from a specific application use Always Encrypted to protect sensitive columns. The application is developed in C#. What must you configure in the application and database?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "always"
Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Define column master key and column encryption key in the database, and update the connection string to include 'Column Encryption Setting=enabled'.
Option D is correct because Always Encrypted requires column master key definitions in the database and client-side driver support (e.g., .NET Framework 4.6.1+ with column encryption setting=enabled). Option A is wrong because Transparent Data Encryption (TDE) encrypts the entire database at rest, not columns at query time. Option B is wrong because Dynamic Data Masking only obfuscates results, not encryption. Option C is wrong because Azure Information Protection is for classification, not SQL encryption.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Enable Transparent Data Encryption (TDE) on the database and use integrated security.
Why it's wrong here
TDE does not provide column-level encryption.
✗
Configure Dynamic Data Masking and use ODBC driver.
Why it's wrong here
Dynamic Data Masking does not encrypt data.
✓
Define column master key and column encryption key in the database, and update the connection string to include 'Column Encryption Setting=enabled'.
Why this is correct
This enables Always Encrypted in the client driver.
Clue confirmation
The clue word "always" in the question point toward this answer.
Use Azure Information Protection labels and configure the application to enforce protection.
Why it's wrong here
AIP is for classification, not SQL encryption.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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. Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets. 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 AZ-500 question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
Secure compute, storage, and databases — This question tests Secure compute, storage, and databases — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Define column master key and column encryption key in the database, and update the connection string to include 'Column Encryption Setting=enabled'. — Option D is correct because Always Encrypted requires column master key definitions in the database and client-side driver support (e.g., .NET Framework 4.6.1+ with column encryption setting=enabled). Option A is wrong because Transparent Data Encryption (TDE) encrypts the entire database at rest, not columns at query time. Option B is wrong because Dynamic Data Masking only obfuscates results, not encryption. Option C is wrong because Azure Information Protection is for classification, not SQL encryption.
What should I do if I get this AZ-500 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
Are there clue words in this question I should notice?
Yes — watch for: "always". Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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