- A
Azure Blob Storage soft delete.
Why wrong: Soft delete protects against accidental deletion by retaining deleted data for a period, but it does not provide a changelog for updates or show who made the changes.
- B
Azure Blob Storage versioning.
Why wrong: Versioning automatically saves the previous versions of a blob, but it does not provide a chronological log of changes with user identity. It is useful for recovery but not for a detailed audit trail of all operations.
- C
Blob Storage change feed.
The change feed records all modifications to blobs in an immutable event log. It can be used with Azure Diagnostics logs to correlate user identity (from storage analytics) to understand who performed the action.
- D
Azure Storage analytics logs.
Why wrong: Storage analytics logs capture detailed information about requests to the storage service, including user identity. However, logs are not immutable and can be overwritten; they are typically used for monitoring, not as a guaranteed audit trail. The change feed provides an immutable ordered log.
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.
A company stores sensitive financial documents in Azure Blob Storage. The security team needs to maintain an immutable log of all changes to the blob content, including the previous versions and the identity of the user who made the changes, for forensic analysis. Which Azure Storage feature should they enable on the storage account to meet this requirement?
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
Blob Storage change feed.
The Blob Storage change feed provides an immutable, append-only log of all changes (create, update, delete) to blobs and blob metadata, including the previous version and the identity of the user who made the change via the requestor's object ID. This meets the forensic requirement for a complete audit trail of blob content changes.
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.
- ✗
Azure Blob Storage soft delete.
Why it's wrong here
Soft delete protects against accidental deletion by retaining deleted data for a period, but it does not provide a changelog for updates or show who made the changes.
- ✗
Azure Blob Storage versioning.
Why it's wrong here
Versioning automatically saves the previous versions of a blob, but it does not provide a chronological log of changes with user identity. It is useful for recovery but not for a detailed audit trail of all operations.
- ✓
Blob Storage change feed.
Why this is correct
The change feed records all modifications to blobs in an immutable event log. It can be used with Azure Diagnostics logs to correlate user identity (from storage analytics) to understand who performed the action.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Azure Storage analytics logs.
Why it's wrong here
Storage analytics logs capture detailed information about requests to the storage service, including user identity. However, logs are not immutable and can be overwritten; they are typically used for monitoring, not as a guaranteed audit trail. The change feed provides an immutable ordered log.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse versioning (which preserves previous versions for recovery) with the change feed (which provides an immutable audit log of changes), leading them to select versioning when the requirement explicitly calls for a forensic log with user identity.
Trap categories for this question
Command / output trap
Soft delete protects against accidental deletion by retaining deleted data for a period, but it does not provide a changelog for updates or show who made the changes.
Detailed technical explanation
How to think about this question
The change feed is stored as a sequence of JSON records in a dedicated `$blobchangefeed` container, with each record containing the blob name, version ID, previous version ID, event type, and the `subject` field that includes the user principal name (UPN) or object ID of the caller. It is enabled at the storage account level and supports a retention period of up to 30 days, making it suitable for forensic analysis where an immutable, ordered log of all mutations is required.
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.
TExam Day Tips
- 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Secure compute, storage, and databases — study guide chapter
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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: Blob Storage change feed. — The Blob Storage change feed provides an immutable, append-only log of all changes (create, update, delete) to blobs and blob metadata, including the previous version and the identity of the user who made the change via the requestor's object ID. This meets the forensic requirement for a complete audit trail of blob content changes.
What should I do if I get this AZ-500 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
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