The answer is that the Data Lake Storage account lacks Get and Wrap Key permissions on the key vault. This is the most likely cause because when you configure customer-managed encryption keys for Azure Data Lake Storage Gen2, the storage account’s managed identity must be granted explicit Get and Wrap Key permissions in the key vault’s access policy; without these, the service cannot retrieve the key to encrypt or decrypt data, causing the ARM template deployment to fail. On the DP-203 exam, this scenario tests your understanding of how Azure RBAC and Key Vault access policies interact with storage encryption, and it often appears as a trick where candidates overlook the need for both permissions—Get alone is insufficient. A common trap is assuming a valid key URI or existing key version guarantees access, but the identity’s permissions are the gatekeeper. Remember the mnemonic: “Get and Wrap, or your key will snap.”
DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and data processing. 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.
Exhibit
Refer to the exhibit.
{
"encryption": {
"keySource": "Microsoft.Keyvault",
"keyvaultproperties": {
"keyvaulturi": "https://mykeyvault.vault.azure.net/",
"keyname": "mykey",
"keyversion": "1"
}
}
}
You are reviewing the ARM template snippet for an Azure Data Lake Storage Gen2 account. The template fails to deploy with an error that the encryption key cannot be accessed. 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 Data Lake Storage account does not have Get and Wrap Key permissions on the key vault.
Option C is correct because the Data Lake Storage account's managed identity (or the user deploying) needs access to the Key Vault to retrieve the key. If the identity does not have 'Get' and 'Wrap Key' permissions, it will fail. Option A is wrong because the URI is valid. Option B is wrong because the key version exists. Option D is wrong because soft-delete is not required for access, though it is recommended.
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 key vault does not have soft-delete enabled.
Why it's wrong here
Soft-delete is not required for encryption key access.
✓
The Data Lake Storage account does not have Get and Wrap Key permissions on the key vault.
Why this is correct
The storage account's identity must have these permissions to use the key.
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 name or version is incorrect.
Why it's wrong here
The key name and version are specified.
✗
The key vault URI is incorrectly formatted.
Why it's wrong here
The URI appears correctly formatted.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
Identify which DP-203 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, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Data Lake Storage account does not have Get and Wrap Key permissions on the key vault. — Option C is correct because the Data Lake Storage account's managed identity (or the user deploying) needs access to the Key Vault to retrieve the key. If the identity does not have 'Get' and 'Wrap Key' permissions, it will fail. Option A is wrong because the URI is valid. Option B is wrong because the key version exists. Option D is wrong because soft-delete is not required for access, though it is recommended.
What should I do if I get this DP-203 question wrong?
Identify which DP-203 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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