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.
You manage an Azure SQL Database that has automatic tuning enabled. You receive an alert that the database is experiencing plan regression. The automatic tuning has forced a plan, but performance is still poor. What should you do first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Disable automatic tuning and create a plan guide.
Why wrong: Plan guides are a last resort.
Review the Query Store to identify the root cause of regression.
Query Store provides insights into plan changes and performance.
Manually revert to the previous plan using Query Store.
Why wrong: Reverting blindly may not solve the issue.
Scale up the database to reduce resource pressure.
Why wrong: Scaling may mask the problem.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Review the Query Store to identify the root cause of regression.
Option B is correct because Query Store can show plan history and regression details, helping analyze why the forced plan is not optimal. Option A is wrong because reverting may cause further regression. Option C is wrong because manual plan guide may be too drastic. Option D is wrong because scaling up doesn't address plan quality.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Disable automatic tuning and create a plan guide.
Why it's wrong here
Plan guides are a last resort.
Review the Query Store to identify the root cause of regression.
Why this is correct
Query Store provides insights into plan changes and performance.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Manually revert to the previous plan using Query Store.
Why it's wrong here
Reverting blindly may not solve the issue.
Scale up the database to reduce resource pressure.
Why it's wrong here
Scaling may mask the problem.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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.
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FAQ
Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Read the scenario before looking for a memorised answer..
The correct answer is: Review the Query Store to identify the root cause of regression. — Option B is correct because Query Store can show plan history and regression details, helping analyze why the forced plan is not optimal. Option A is wrong because reverting may cause further regression. Option C is wrong because manual plan guide may be too drastic. Option D is wrong because scaling up doesn't address plan quality.
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.
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
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