DP-900 Describe an analytics workload on Azure Practice Question
This DP-900 practice question tests your understanding of describe an analytics workload on azure. 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.
Exhibit
Refer to the exhibit.
```kusto
let startTime = datetime(2025-01-01T00:00:00Z);
let endTime = datetime(2025-01-02T00:00:00Z);
AzureDiagnostics
| where ResourceType == "AZURESQLDB"
| where TimeGenerated between (startTime .. endTime)
| where OperationName == "QueryThrottled"
| summarize Count = count() by DatabaseName, bin(TimeGenerated, 1h)
| render timechart
```
Refer to the exhibit. A database administrator runs this KQL query in Azure Monitor Log Analytics. The query returns no results. What is the most likely reason?
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.
Refer to the exhibit.
```kusto
let startTime = datetime(2025-01-01T00:00:00Z);
let endTime = datetime(2025-01-02T00:00:00Z);
AzureDiagnostics
| where ResourceType == "AZURESQLDB"
| where TimeGenerated between (startTime .. endTime)
| where OperationName == "QueryThrottled"
| summarize Count = count() by DatabaseName, bin(TimeGenerated, 1h)
| render timechart
```
A
The summarize operator syntax is wrong
Why wrong: The summarize syntax is correct.
B
The ResourceType filter is incorrect
Azure SQL Database diagnostics use ResourceType 'MICROSOFT.SQL/SERVERS/DATABASES', not 'AZURESQLDB'.
C
The render command is not supported
Why wrong: render timechart is supported in Log Analytics.
D
The time range is incorrect
Why wrong: The time range is valid and includes a full day.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The ResourceType filter is incorrect
The KQL query filters on `ResourceType` with a value that does not match any actual Azure resource type (e.g., a typo or incorrect casing). Since Azure Monitor Log Analytics stores resource types in a specific format (e.g., 'microsoft.compute/virtualmachines'), an incorrect filter will return zero results even if data exists. The query syntax, render command, and time range are all valid, so the filter is the most likely cause.
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 summarize operator syntax is wrong
Why it's wrong here
The summarize syntax is correct.
✓
The ResourceType filter is incorrect
Why this is correct
Azure SQL Database diagnostics use ResourceType 'MICROSOFT.SQL/SERVERS/DATABASES', not 'AZURESQLDB'.
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 render command is not supported
Why it's wrong here
render timechart is supported in Log Analytics.
✗
The time range is incorrect
Why it's wrong here
The time range is valid and includes a full day.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Microsoft often tests the candidate's understanding that KQL filters are case-sensitive and that resource type values must exactly match the Azure Resource Manager format, leading candidates to overlook a simple typo or casing error.
Detailed technical explanation
How to think about this question
In Kusto Query Language (KQL), the `where` clause is case-sensitive for string comparisons unless using the `=~` operator. Azure resource types in the `AzureActivity` or `AzureDiagnostics` tables follow the Azure Resource Manager naming convention (e.g., 'Microsoft.Compute/virtualMachines'), so a mismatch in casing or spelling will silently exclude all rows. The `summarize` operator groups rows and computes aggregates, but it cannot produce results if the input table is empty due to a prior filter.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-900 question in full detail.
Describe an analytics workload on Azure — This question tests Describe an analytics workload on Azure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The ResourceType filter is incorrect — The KQL query filters on `ResourceType` with a value that does not match any actual Azure resource type (e.g., a typo or incorrect casing). Since Azure Monitor Log Analytics stores resource types in a specific format (e.g., 'microsoft.compute/virtualmachines'), an incorrect filter will return zero results even if data exists. The query syntax, render command, and time range are all valid, so the filter is the most likely cause.
What should I do if I get this DP-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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Question Discussion
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