Administering Microsoft Azure SQL Solutions (DP-300) — Practice Questions and Mock Exam

The DP-300 certification validates skills in planning, implementing, and managing data platform solutions on Azure. It covers SQL Server and Azure SQL database administration including deployment, security, monitoring, performance optimization, high availability, disaster recovery, and automation of administrative tasks using both Azure portal and T-SQL.

This certification is designed for database administrators who manage on-premises SQL Server and Azure SQL databases including Azure SQL Database, Azure SQL Managed Instance, and SQL Server on Azure VMs. Candidates should have strong T-SQL skills and experience with database maintenance, security configuration, and performance tuning.

Securing the environment and monitoring/optimizing database resources are the two heaviest domains at 20–25% each — authentication, encryption, and compliance controls on one side; Query Store, DMVs, and index tuning on the other. High-availability and disaster-recovery planning takes another 20–25%. Platform deployment and configuration, and task automation, round out the blueprint at 15–20% apiece.

Three domains share the same published weight band, which means DP-300 doesn't let you specialize in security or performance alone: a DBA who can secure a database but can't diagnose a slow query, or vice versa, is underprepared for roughly half the exam.

DP-300 draws 40–60 questions from a mix of multiple-choice, multiple-select, drag-and-drop, ordering, and dropdown-selection formats inside a 100-minute window. Items favor diagnosis over recall: a performance symptom or failure scenario is described using DMV output, execution plans, or Query Store data, and you identify the T-SQL or configuration change that resolves it.

The DP-300 pool covers every exam domain and keeps growing with new questions. A mock exam asks 50 questions in one sitting, on the same 100-minute clock as the real thing.

How long you'll need depends on how much hands-on experience you bring. The rest is set by the vendor: how the exam is delivered, how soon you can retake it, and how long the credential stays valid.

DP-300 runs through Pearson VUE, either online with a remote proctor or at an authorized testing center, and is offered in English, German, French, Spanish, Portuguese, Italian, Japanese, Korean, and Chinese. Certification holds for one year, and Microsoft opens a free renewal assessment on Learn starting six months before it expires.

The three Azure SQL deployment options (Database, Managed Instance, and Server on Azure VMs) solve overlapping problems differently, and picking the right one for a given compatibility, control, or licensing requirement is tested repeatedly. Performance tuning goes deep: Query Store, execution plans, missing-index DMVs, and the intelligent query processing features that flag them are graded scenario by scenario, not as isolated facts. High-availability options get confused with each other, too — auto-failover groups, active geo-replication, and Always On availability groups each apply to a different Azure SQL deployment type, and using the wrong one for the platform is a common miss. Security configuration (Transparent Data Encryption, Always Encrypted, dynamic data masking, auditing) and task automation through Azure Automation, elastic jobs, and SQL Agent round out where candidates lose points.