DP-300 Practice Question: Monitor, configure, and optimize database resources
You are configuring performance monitoring for Azure SQL Managed Instance. You need to collect and analyze query performance data with minimal overhead. Which solution should you use?
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
✓
Query Store
Query Store is built-in and designed for low overhead query performance monitoring. Option B is wrong because Azure Monitor metrics provide resource-level metrics, not query-level details. Option C is wrong because Extended Events can have higher overhead and is more for custom event collection. Option D is wrong because SQL Server Profiler is deprecated and has high overhead.
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
Why this is correct
Query Store provides built-in, low-overhead query performance monitoring and analysis.
- ✗
Azure Monitor metrics
Why it's wrong here
Azure Monitor metrics provide resource-level performance data, not query-specific analysis.
- ✗
Extended Events
Why it's wrong here
Extended Events capture granular, event-driven telemetry but impose significant overhead when used for continuous, ad-hoc query performance analysis, as they require manual session configuration and event filtering to avoid resource consumption. This fails the "minimal overhead" requirement because the correct solution, Query Store, uses built-in, low-impact plan and runtime statistics collection. Extended Events are tempting because they excel at deep-dive troubleshooting of specific, transient issues, such as deadlocks or blocked processes, where their precise event capture is ideal.
- ✗
SQL Server Profiler
Why it's wrong here
SQL Server Profiler is deprecated and introduces significant overhead.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
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.
Key term
Azure SQL Managed Instance
Azure SQL Managed Instance is a fully managed cloud database service that gives you nearly all the features of Microsoft SQL Server on your own server, without you having to manage the hardware or operating system.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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