DP-300 Exam Dumps | You have an Azure SQL Database managed instance. The instance starts experiencing performance issues.

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Microsoft.DP-300.v2026-09-14.q168
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Question 143/168

You have an Azure SQL Database managed instance.
The instance starts experiencing performance issues.
You need to identify which query is causing the issue and retrieve the execution plan for the query. The solution must minimize administrative effort.
What should you use?

A. the Azure portal

B. Extended Events

C. Query Store

D. dynamic management views

Correct Answer: D

Reference:
https://docs.microsoft.com/en-us/sql/relational-databases/performance/monitoring-performance-by-using-the- query-store?view=sql-server-ver15 Basic Concept: This question tests performance optimization for SQL workloads, including Query Store, automatic tuning, index/statistics maintenance, and engine-level resource behavior.
Why D is Correct: dynamic management views matches the expected DP-300 administration action. dynamic management views is related to operational monitoring or tuning, but it must match the exact signal needed:
query history, resource utilization, wait/blocking detail, or automatic remediation. The question is not asking for a general Azure capability; it is asking for the feature that produces this result: You need to identify which query is causing the issue and retrieve the execution plan for the query.
Why A is Wrong: the Azure portal is related to operational monitoring or tuning, but it must match the exact signal needed: query history, resource utilization, wait/blocking detail, or automatic remediation. It does not expose the required metric, query history, wait/blocking signal, or tuning mechanism; using it would not give the administrator the evidence requested.
Why B is Wrong: Extended Events is related to operational monitoring or tuning, but it must match the exact signal needed: query history, resource utilization, wait/blocking detail, or automatic remediation. It is useful in other troubleshooting paths, but this scenario requires a more specific monitoring or optimization feature.
Why C is Wrong: Query Store captures query text, plans, and runtime statistics, making it central for reviewing query history and troubleshooting plan regressions. It would produce a different operational signal than the one needed to investigate, alert, or tune the workload in this question.

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