The answer is that the diagnostic settings are not configured to send QueryStoreRuntimeStatistics to Log Analytics. This is the most likely reason because Azure Diagnostics logs for SQL databases require explicit configuration to collect specific categories of telemetry, and Query Store runtime statistics are not included by default. Even when Query Store is enabled on all databases, the diagnostic settings must have the QueryStoreRuntimeStatistics category selected to stream that data to Log Analytics; without it, queries like the one shown will return no results for the last 24 hours. On the Microsoft Azure Database Administrator Associate DP-300 exam, this scenario tests your understanding of how diagnostic settings act as a gatekeeper for log data—a common trap is assuming that enabling Query Store alone is sufficient. A helpful memory tip is to think of diagnostic settings as a faucet: you must turn the handle for each log category, including QueryStoreRuntimeStatistics, before the data flows into Log Analytics.
DP-300 Practice Question: Monitor, configure, and optimize database resources
This DP-300 practice question tests your understanding of monitor, configure, and optimize database resources. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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
AzureDiagnostics
| where ResourceProvider == "MICROSOFT.SQL"
| where Category == "QueryStoreRuntimeStatistics"
| summarize avg(avg_cpu_time) by DatabaseName, bin(TimeGenerated, 1h)
| render timechart
```
You are analyzing the exhibit KQL query that queries Azure Diagnostics logs for Query Store runtime statistics. The query is intended to show average CPU time per hour for each database. However, the result shows no data for the last 24 hours, although Query Store is enabled on all databases. 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The diagnostic settings are not configured to send QueryStoreRuntimeStatistics to Log Analytics.
Option B is correct because Query Store runtime statistics are sent to Azure Diagnostics only if diagnostic settings are configured to collect that category. Option A is wrong because Query Store is enabled. Option C is wrong because the query is correct. Option D is wrong because the query does not have time filter.
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.
✗
Query Store is not enabled on the databases.
Why it's wrong here
The stem says Query Store is enabled.
✓
The diagnostic settings are not configured to send QueryStoreRuntimeStatistics to Log Analytics.
Why this is correct
Without that category, no data is collected.
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 time range in the query is too narrow and excludes the last 24 hours.
Why it's wrong here
The bin function uses TimeGenerated; the query does not filter time, so it should show all data.
✗
The query syntax is incorrect and needs to use 'project' before 'summarize'.
Why it's wrong here
The query syntax is valid.
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
The bin function uses TimeGenerated; the query does not filter time, so it should show all data.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Identify which DP-300 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.
Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The diagnostic settings are not configured to send QueryStoreRuntimeStatistics to Log Analytics. — Option B is correct because Query Store runtime statistics are sent to Azure Diagnostics only if diagnostic settings are configured to collect that category. Option A is wrong because Query Store is enabled. Option C is wrong because the query is correct. Option D is wrong because the query does not have time filter.
What should I do if I get this DP-300 question wrong?
Identify which DP-300 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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