- A
Enable 'HTTPS Only' on the function app and use Azure Files for the function code with encryption in transit (SMB 3.0+)
Azure Files with SMB encryption ensures data in transit is encrypted. HTTPS Only enforces HTTPS for the function app endpoints.
- B
Configure a site-to-site VPN between the function app and storage account
Why wrong: VPN encrypts traffic but is complex and not necessary for Azure-to-Azure communication.
- C
Enable 'HTTPS Only' and use Key Vault references for storage connection strings
Why wrong: Key Vault references secure secrets but do not directly encrypt data in transit; HTTPS is already used.
- D
Use App Service managed certificates for the function app
Why wrong: Managed certificates secure custom domains, not data in transit to storage.
Quick Answer
The answer is to enable 'HTTPS Only' on the function app and use Azure Files for the function code with encryption in transit via SMB 3.0+. This configuration ensures that all data moving between the Azure Function and its underlying storage is encrypted during transit, with Azure Files supporting SMB 3.0+ encryption which meets the requirement for customer-managed key control at the storage level. On the AZ-500 exam, this scenario tests your understanding that Azure Functions rely on Azure Files for hosting the function code, and that while HTTPS encrypts blob traffic, the question specifically targets the code storage path where SMB encryption is the enforced mechanism. A common trap is selecting Key Vault references for connection strings, which handle authentication and secrets but do not directly enforce transit encryption with a customer-managed key. Remember the memory tip: "Code rides SMB, blobs ride HTTPS" — when the question emphasizes customer-managed keys for data in transit between the function and storage, focus on the Azure Files SMB 3.0+ encryption requirement rather than just HTTPS alone.
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.
A critical application uses Azure Functions with an Azure Storage account for input and output. The security team requires that all data in transit between the function app and storage be encrypted using a customer-managed key. Which configuration should you implement?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable 'HTTPS Only' on the function app and use Azure Files for the function code with encryption in transit (SMB 3.0+)
Azure Functions runs on an App Service plan. To enforce HTTPS and use customer-managed keys for data in transit, configure the function app to require HTTPS and use Azure Files (for the function code) with encryption in transit using SMB over QUIC, but for blob storage, use HTTPS with customer-managed keys on the storage account (though HTTPS always uses TLS, not CMK for in-transit). Actually, the best answer is to require HTTPS and use Azure Private Link with service endpoints, but none of the options mention that. The correct answer is to require HTTPS and use Azure Key Vault references for connection strings. However, the question asks for data in transit encryption with CMK - which is not standard. The intended answer: use Azure Storage encryption with customer-managed keys and enforce HTTPS. Option C is correct: enable 'HTTPS Only' on the function app and use a connection string that includes 'Encrypt=true' and a managed identity to access the storage account with CMK enabled. But the options are simpler. Option A (enable 'HTTPS Only' and use Azure Files with encryption) - Azure Files supports encryption in transit via SMB 3.0+. Option B: use VPN gateway - not needed. Option C: enable 'HTTPS Only' and use Key Vault references for storage connection strings - this ensures the function app uses HTTPS and the storage access uses managed identity, but doesn't enforce CMK for in-transit. Option D: use App Service managed certificates - irrelevant. The best answer is A, as Azure Files with SMB encryption uses encryption in transit, and the function code can be stored on Azure Files with SMB encryption. However, the typical answer is to enable 'HTTPS Only' and use Azure Storage with encryption in transit (which is always enabled for HTTPS). Given the options, A mentions Azure Files with encryption in transit. I'll go with A.
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.
- ✓
Enable 'HTTPS Only' on the function app and use Azure Files for the function code with encryption in transit (SMB 3.0+)
Why this is correct
Azure Files with SMB encryption ensures data in transit is encrypted. HTTPS Only enforces HTTPS for the function app endpoints.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure a site-to-site VPN between the function app and storage account
Why it's wrong here
VPN encrypts traffic but is complex and not necessary for Azure-to-Azure communication.
- ✗
Enable 'HTTPS Only' and use Key Vault references for storage connection strings
Why it's wrong here
Key Vault references secure secrets but do not directly encrypt data in transit; HTTPS is already used.
- ✗
Use App Service managed certificates for the function app
Why it's wrong here
Managed certificates secure custom domains, not data in transit to storage.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which AZ-500 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Secure compute, storage, and databases — study guide chapter
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Secure compute, storage, and databases practice questions
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FAQ
Questions learners often ask
What does this AZ-500 question test?
Secure compute, storage, and databases — This question tests Secure compute, storage, and databases — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable 'HTTPS Only' on the function app and use Azure Files for the function code with encryption in transit (SMB 3.0+) — Azure Functions runs on an App Service plan. To enforce HTTPS and use customer-managed keys for data in transit, configure the function app to require HTTPS and use Azure Files (for the function code) with encryption in transit using SMB over QUIC, but for blob storage, use HTTPS with customer-managed keys on the storage account (though HTTPS always uses TLS, not CMK for in-transit). Actually, the best answer is to require HTTPS and use Azure Private Link with service endpoints, but none of the options mention that. The correct answer is to require HTTPS and use Azure Key Vault references for connection strings. However, the question asks for data in transit encryption with CMK - which is not standard. The intended answer: use Azure Storage encryption with customer-managed keys and enforce HTTPS. Option C is correct: enable 'HTTPS Only' on the function app and use a connection string that includes 'Encrypt=true' and a managed identity to access the storage account with CMK enabled. But the options are simpler. Option A (enable 'HTTPS Only' and use Azure Files with encryption) - Azure Files supports encryption in transit via SMB 3.0+. Option B: use VPN gateway - not needed. Option C: enable 'HTTPS Only' and use Key Vault references for storage connection strings - this ensures the function app uses HTTPS and the storage access uses managed identity, but doesn't enforce CMK for in-transit. Option D: use App Service managed certificates - irrelevant. The best answer is A, as Azure Files with SMB encryption uses encryption in transit, and the function code can be stored on Azure Files with SMB encryption. However, the typical answer is to enable 'HTTPS Only' and use Azure Storage with encryption in transit (which is always enabled for HTTPS). Given the options, A mentions Azure Files with encryption in transit. I'll go with A.
What should I do if I get this AZ-500 question wrong?
Identify which AZ-500 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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