DP-300 Practice Question: Monitor, configure, and optimize database resources
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?
Answer choices
Why each option matters
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.
Query Store can show plan history and regression details, helping analyze why the forced plan is not optimal. Option A is wrong because disabling automatic tuning and creating a plan guide may be premature without first identifying the root cause. Option C is wrong because manually reverting to a previous plan using Query Store should not be the first action; you need to understand the regression first. Option D is wrong because scaling up the database does not directly address plan quality or regression.
Answer analysis
Option-by-option breakdown
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
Reverting may cause further regression.
- ✓
Review the Query Store to identify the root cause of regression.
Why this is correct
Query Store can show plan history and regression details, helping analyze why the forced plan is not optimal.
- ✗
Manually revert to the previous plan using Query Store.
Why it's wrong here
Manually reverting to a previous plan without first understanding why the forced plan is performing poorly could lead to repeated regression. The first step should be to review the Query Store to identify the root cause.
- ✗
Scale up the database to reduce resource pressure.
Why it's wrong here
Scaling up doesn't address plan quality.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
Key term
Azure SQL Performance Tuning
Azure SQL Performance Tuning is the process of optimizing the speed and efficiency of queries and database operations in Microsoft Azure SQL Database or SQL Managed Instance to reduce latency and improve throughput.
Key term
Query Store
Query Store is a built-in SQL Server feature that captures and stores a history of query execution plans and performance data for easy monitoring and troubleshooting.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-300 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-300 exam.