The answer is that the existence condition incorrectly checks for a specific log category 'StorageRead' instead of any diagnostic setting. This is the most likely cause because the Azure Policy audit for diagnostic settings uses an existence condition to evaluate whether a resource has a diagnostic setting deployed; when the condition narrows the check to a single category like 'StorageRead', it will only flag resources missing that specific log, while ignoring storage accounts that have no diagnostic setting at all or that have a different category configured. On the Microsoft Azure Data Engineer Associate DP-203 exam, this scenario tests your understanding of how AuditIfNotExists policies evaluate resource configurations, and it is a common trap to confuse checking for a specific log category with checking for the existence of any diagnostic setting. A useful memory tip is to remember that existence conditions should look for the setting itself, not a particular log within it—think "check the box, not the label."
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
{
"type": "Microsoft.Authorization/policyDefinitions",
"properties": {
"displayName": "Audit diagnostic setting for Azure Data Lake Storage Gen2",
"policyType": "Custom",
"description": "Audit if diagnostic setting is not configured for Data Lake Storage Gen2",
"parameters": {
"effect": {
"type": "String",
"allowedValues": ["AuditIfNotExists", "Deny", "Disabled"],
"defaultValue": "AuditIfNotExists"
}
},
"policyRule": {
"if": {
"field": "type",
"equals": "Microsoft.Storage/storageAccounts"
},
"then": {
"effect": "[parameters('effect')]",
"details": {
"type": "Microsoft.Insights/diagnosticSettings",
"existenceCondition": {
"field": "Microsoft.Insights/diagnosticSettings/logs[*].category",
"equals": "StorageRead"
}
}
}
}
}
}
Refer to the exhibit. You are reviewing an Azure Policy definition that was created to audit diagnostic settings for Azure Data Lake Storage Gen2. The policy is assigned to a management group containing several storage accounts. You notice that the policy is not flagging storage accounts that lack diagnostic settings. 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 existence condition incorrectly checks for a specific log category 'StorageRead' instead of any diagnostic setting.
Option C is correct because the existence condition checks if a diagnostic setting of category 'StorageRead' exists, but the policy should check for any diagnostic setting. Option A is wrong because the policy type is custom, but that doesn't cause the issue. Option B is wrong because the effect is parameterized and default is AuditIfNotExists, which should work. Option D is wrong because the field check for type is correct.
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 existence condition incorrectly checks for a specific log category 'StorageRead' instead of any diagnostic setting.
Why this is correct
The policy should audit if no diagnostic setting exists, not check for a specific category.
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 'field' property in the 'if' condition should be 'type' equals 'Microsoft.Storage/storageAccounts/blobServices' for Data Lake.
Why it's wrong here
Data Lake Gen2 uses storage accounts.
✗
The effect parameter is not assigned a value; the default 'AuditIfNotExists' is not applied.
Why it's wrong here
Default value is used when not specified.
✗
The policy type is 'Custom', which requires special permissions to evaluate.
Why it's wrong here
Custom policies work like built-in ones.
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 existence condition incorrectly checks for a specific log category 'StorageRead' instead of any diagnostic setting. — Option C is correct because the existence condition checks if a diagnostic setting of category 'StorageRead' exists, but the policy should check for any diagnostic setting. Option A is wrong because the policy type is custom, but that doesn't cause the issue. Option B is wrong because the effect is parameterized and default is AuditIfNotExists, which should work. Option D is wrong because the field check for type is correct.
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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