The correct answer is to enable Transparent Data Encryption (TDE) for data at rest and configure the connection string with 'Encrypt=True' and 'TrustServerCertificate=False' for data in transit. TDE automatically encrypts the entire database and backup files at the storage level, meeting at-rest compliance, while the connection string forces Transport Layer Security (TLS) encryption for all data moving between the application and the managed instance, rejecting untrusted server certificates to prevent man-in-the-middle attacks. On the AZ-500 exam, this question tests your ability to distinguish between encryption layers: TDE covers the storage layer, Always Encrypted protects specific columns (a common distractor), and Azure AD or VNet rules handle identity or network access, not encryption. A frequent trap is confusing column-level encryption with full database encryption. Remember the mnemonic: “TDE for the disk, TLS for the trip.”
AZ-500 Secure compute, storage, and databases Practice Question
This AZ-500 practice question tests your understanding of secure compute, storage, and databases. 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.
Your company plans to use Azure SQL Managed Instance to store customer data. You need to comply with regulatory requirements for data encryption at rest and in transit, and you must ensure that only authorized applications can access the database. Which TWO actions should you take? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Transparent Data Encryption (TDE) with customer-managed keys
Options B and D are correct. Transparent Data Encryption (TDE) encrypts data at rest. 'Force encryption' in the connection string ensures data in transit is encrypted. Option A is wrong because Always Encrypted protects specific columns, not the entire database at rest. Option C is wrong because Azure AD authentication provides identity, not encryption. Option E is wrong because VNet rules control network access, not 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) with customer-managed keys
Protects specific columns, not entire database at rest.
✗
Configure Azure AD authentication for the managed instance
Why it's wrong here
Provides identity management, not 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 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 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: Enable Transparent Data Encryption (TDE) with customer-managed keys — Options B and D are correct. Transparent Data Encryption (TDE) encrypts data at rest. 'Force encryption' in the connection string ensures data in transit is encrypted. Option A is wrong because Always Encrypted protects specific columns, not the entire database at rest. Option C is wrong because Azure AD authentication provides identity, not encryption. Option E is wrong because VNet rules control network access, not 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.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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