The answer is to enable Azure AD authentication for the storage account and enable Microsoft Defender for Storage. This combination works because Azure AD provides identity-based access control, ensuring only authenticated users can upload blobs without relying on shared keys or SAS tokens, while Defender for Storage automatically scans uploaded files for malware using threat intelligence. On the AZ-500 exam, this scenario tests your understanding of securing data at rest and in transit, often appearing as a distractor where SAS tokens or network controls like Azure Firewall are incorrectly chosen. A common trap is selecting Event Grid, which handles events but not authentication or scanning. Remember the pairing: Azure AD for who can upload, Defender for Storage for what gets scanned.
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.
You are deploying a web application that stores user-uploaded files in Azure Blob Storage. You need to ensure that only authenticated users can upload files, and that uploaded files are automatically scanned for malware. What 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
✓
Enable Azure AD authentication for the storage account and enable Microsoft Defender for Storage
Option D is correct: Azure AD authentication for the storage account ensures only authenticated users can access, and Microsoft Defender for Storage provides malware scanning. Option A (SAS tokens) are shared access signatures, not user-specific. Option B (Event Grid) is for event handling, not authentication. Option C (Azure Firewall) is network-level, not application-level.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use Azure Event Grid to trigger a function for malware scanning
Why it's wrong here
Event Grid triggers events, but does not handle authentication.
✓
Enable Azure AD authentication for the storage account and enable Microsoft Defender for Storage
Why this is correct
Provides user authentication and malware scanning.
Related concept
Static NAT maps one inside address to one outside address.
✗
Configure Azure Firewall to allow only the web app's IP address
Why it's wrong here
Does not authenticate users.
✗
Use shared access signatures (SAS) with stored access policies
Why it's wrong here
SAS tokens are not tied to specific users.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-500 NAT questions on configuration and troubleshooting.
Secure compute, storage, and databases — This question tests Secure compute, storage, and databases — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable Azure AD authentication for the storage account and enable Microsoft Defender for Storage — Option D is correct: Azure AD authentication for the storage account ensures only authenticated users can access, and Microsoft Defender for Storage provides malware scanning. Option A (SAS tokens) are shared access signatures, not user-specific. Option B (Event Grid) is for event handling, not authentication. Option C (Azure Firewall) is network-level, not application-level.
What should I do if I get this AZ-500 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-500 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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