The answer is that the storage upload fails because the key version is pinned, and after a key version rotation, the old key version may be disabled or deleted. When you pin a specific version of a customer-managed key (CMK) in Azure Key Vault, the storage account relies exclusively on that exact version for encryption. If the key is rotated—meaning a new version is created—the old version is often disabled or purged as part of standard lifecycle management, breaking the encryption path and blocking uploads. This scenario is a classic trap on the AZ-500 exam, testing your understanding of how CMK versioning interacts with Azure Storage encryption settings; many candidates mistakenly blame permissions or the key vault URI. The key insight is that unpinned keys (using “latest” version) automatically follow rotations, while pinned keys do not. Memory tip: “Pinned means pinned to failure—always use ‘latest’ for seamless rotation.”
AZ-500 Secure compute, storage, and databases Practice Question
This AZ-500 practice question tests your understanding of secure compute, storage, and databases. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Refer to the exhibit. You have an Azure Storage account with the encryption configuration shown. Users report that they cannot upload files to the storage account. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The key version is pinned; if the key was rotated, the old version may be disabled.
The key version is pinned to a specific version. If the key is rotated, the old version may be disabled or deleted, causing access failures. Option A is wrong because the key source is Key Vault, not Microsoft-managed. Option B is wrong because the key vault URI is valid. Option D is wrong because key permissions are not directly indicated.
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.
✗
The storage account does not have permissions to access the key vault.
Why it's wrong here
Permissions are not shown, but typically required.
✓
The key version is pinned; if the key was rotated, the old version may be disabled.
Why this is correct
Pinned key versions can cause issues if the key is rotated.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The key vault URI is incorrect.
Why it's wrong here
The URI appears valid.
✗
The encryption key source is set to Microsoft.Keyvault but should be Microsoft.Storage.
Why it's wrong here
Key Vault is a valid key source.
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.
Trap categories for this question
Command / output trap
Permissions are not shown, but typically required.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-500 question in full detail.
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.
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: The key version is pinned; if the key was rotated, the old version may be disabled. — The key version is pinned to a specific version. If the key is rotated, the old version may be disabled or deleted, causing access failures. Option A is wrong because the key source is Key Vault, not Microsoft-managed. Option B is wrong because the key vault URI is valid. Option D is wrong because key permissions are not directly indicated.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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