Microsoft DP-300 Practice Test
Microsoft DP-300 Practice Test
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Questions updated at Aug 22, 2026, 8:53 PM CDT
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Today's 10 Microsoft DP-300 questions
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Question 1 of 10
Objective Implement compliance controls for sensitive data
Implement a secure environment (20%-25%)
A downstream audit feed must reconstruct the sequence of inserts, updates, and deletes, including historical change values. A developer suggests Change Tracking because it can identify changed rows. Which conclusion is correct?
Change Tracking is lightweight and indicates that a row changed, but a history-oriented mechanism such as CDC is needed when the actual change values must be retained. Source basis: Change Tracking records which rows changed with relatively low overhead but does not retain the historical values of each change; CDC is used when change history is required.
Concept tested:
Question 2 of 10
Objective Configure resources for scale and performance
Plan and implement data platform resources (15%-20%)
A DBA proposes moving an Azure SQL Server VM to a larger SKU because nightly ETL exceeds the SLA. Monitoring shows CPU at 35%, but the data disks reach their throughput cap during the same interval. What is the best next action?
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Concept tested:
Question 3 of 10
Objective Create and manage database tasks in Azure
Configure and manage automation of tasks (15%-20%)
An Elastic Job reports partial failure across 200 targets. Most databases succeeded, but 17 failed with authentication or timeout errors. What should the operator inspect before rerunning against every database?
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Question 4 of 10
Objective Plan and deploy Azure SQL solutions
Plan and implement data platform resources (15%-20%)
A team proposes Fabric mirroring as the only disaster-recovery mechanism for a revenue-critical Azure SQL Database because a copy of data appears in OneLake. The application requires a supported relational failover target with defined recovery behavior. What should the architect do?
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Question 5 of 10
Objective Create and manage SQL Server Agent jobs
Configure and manage automation of tasks (15%-20%)
A T-SQL SQL Server Agent step succeeds interactively under a DBA account but fails as a scheduled job with a permission error. The SQL text is identical. What should the DBA compare first?
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Question 6 of 10
Objective Configure HA/DR for database solutions
Plan and configure a high availability and disaster recovery (HA/DR) environment (20%-25%)
A team needs HA for an entire SQL Server instance, including instance-level jobs and configuration, rather than only a selected set of user databases. Which distinction should drive the choice between FCI and AG?
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Question 7 of 10
Objective Monitor resource activity and performance
Monitor, configure, and optimize database resources (20%-25%)
Users report timeouts, but Azure SQL resource metrics remain well below limits. Wait analysis shows many sessions waiting on locks behind one long transaction. Which interpretation best fits the evidence?
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Question 8 of 10
Objective Configure database authentication and authorization
Implement a secure environment (20%-25%)
A service principal must automate creation of Microsoft Entra users in Azure SQL Database. The security team rejects assigning broad directory-reader permissions when narrower Graph permissions can satisfy resolution. What principle should guide the configuration?
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Question 9 of 10
Objective Plan and perform backup and restore of a database
Plan and configure a high availability and disaster recovery (HA/DR) environment (20%-25%)
An Azure SQL Database has a 7-day PITR retention policy. Today the DBA changes it to 35 days and immediately tries to restore a point from 20 days ago. Why can that fail?
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Question 10 of 10
Objective Monitor and optimize query performance
Monitor, configure, and optimize database resources (20%-25%)
A production Azure SQL Database occasionally regresses after a plan change. The DBA wants a service feature that can detect a plan regression and automatically return to a previously verified better plan when supported. Which capability is the direct fit?
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Question 1 A downstream audit feed must reconstruct the sequence of inserts, updates, and deletes, including historical change values. A developer suggests Change Tracking because it can identify changed rows. Which conclusion is correct?
Answer choices
- A. A private endpoint provides the missing before-images
- B. Change Tracking is ideal because it stores every before-image and after-image
- C. TDE provides the missing change sequence
- D. Change Tracking alone is insufficient because it does not retain the detailed historical values required by the feed
Correct answer
Change Tracking alone is insufficient because it does not retain the detailed historical values required by the feed
Change Tracking is lightweight and indicates that a row changed, but a history-oriented mechanism such as CDC is needed when the actual change values must be retained. Source basis: Change Tracking records which rows changed with relatively low overhead but does not retain the historical values of each change; CDC is used when change history is required.
Wrong-answer review
- A. A private endpoint provides the missing before-images: Incorrect. Network isolation does not capture data-change history.
- B. Change Tracking is ideal because it stores every before-image and after-image: Incorrect. That overstates its capability; it does not preserve full change history.
- C. TDE provides the missing change sequence: Incorrect. Encryption at rest does not produce row-change history.
Extra learning features
Interview question
Q: Change Tracking records which rows changed with relatively low overhead but does not retain the historical values of each change; CDC is used when change history is required. Strong answer: The developer's suggestion of Change Tracking is a good starting point, but the downstream audit feed's need for detailed historical change values necessitates a more robust solution like CDC. Change Tracking is a lightweight mechanism for detecting row changes, whereas CDC provides the full historical sequence of changes, which is critical for reconstructing the audit feed.
- historical values
- change sequence
- audit feed
- CDC
Caution: Don't restate the question. Focus on the difference in capabilities.
Question 2 A DBA proposes moving an Azure SQL Server VM to a larger SKU because nightly ETL exceeds the SLA. Monitoring shows CPU at 35%, but the data disks reach their throughput cap during the same interval. What is the best next action?
Answer choices
- A. Redesign or scale the storage path to remove the measured throughput cap, then retest before increasing compute
- B. Increase vCPUs first because ETL performance is primarily a compute problem
- C. Disable Query Store to reduce disk writes
- D. Reduce max server memory so SQL Server performs more physical I/O
Correct answer
Redesign or scale the storage path to remove the measured throughput cap, then retest before increasing compute
Question 3 An Elastic Job reports partial failure across 200 targets. Most databases succeeded, but 17 failed with authentication or timeout errors. What should the operator inspect before rerunning against every database?
Answer choices
- A. Delete the target group and recreate every database
- B. Rebuild indexes on all 200 databases
- C. Elastic Job execution history at the job-step and target level to identify the failed targets and error details
- D. Change the job schedule to run every minute
Correct answer
Elastic Job execution history at the job-step and target level to identify the failed targets and error details
Question 4 A team proposes Fabric mirroring as the only disaster-recovery mechanism for a revenue-critical Azure SQL Database because a copy of data appears in OneLake. The application requires a supported relational failover target with defined recovery behavior. What should the architect do?
Answer choices
- A. Use an Azure SQL HA/DR technology for application recovery and treat Fabric mirroring as an analytics replication feature
- B. Disable Azure SQL backups because mirrored data makes recovery points redundant
- C. Use OneLake as the failover-group read-write listener
- D. Configure the application to issue T-SQL writes directly to mirrored OneLake tables during an outage
Correct answer
Use an Azure SQL HA/DR technology for application recovery and treat Fabric mirroring as an analytics replication feature
Question 5 A T-SQL SQL Server Agent step succeeds interactively under a DBA account but fails as a scheduled job with a permission error. The SQL text is identical. What should the DBA compare first?
Answer choices
- A. The transaction-log backup schedule
- B. The job owner and effective execution/security context of the scheduled step versus the interactive session
- C. The database file size
- D. The TDE encryption state
Correct answer
The job owner and effective execution/security context of the scheduled step versus the interactive session
Question 6 A team needs HA for an entire SQL Server instance, including instance-level jobs and configuration, rather than only a selected set of user databases. Which distinction should drive the choice between FCI and AG?
Answer choices
- A. Choose based only on database file size
- B. FCI protects the SQL Server instance as a failover unit, whereas an availability group protects selected user databases and has separate handling for instance-level dependencies
- C. Choose AG because it automatically replicates every SQL Agent job
- D. Choose FCI because it is an Azure SQL Database feature
Correct answer
FCI protects the SQL Server instance as a failover unit, whereas an availability group protects selected user databases and has separate handling for instance-level dependencies
Question 7 Users report timeouts, but Azure SQL resource metrics remain well below limits. Wait analysis shows many sessions waiting on locks behind one long transaction. Which interpretation best fits the evidence?
Answer choices
- A. The database needs a larger max size
- B. Concurrency blocking, not resource exhaustion, is the primary issue to investigate
- C. The primary issue is backup retention
- D. The database must be undersized because timeouts always mean resource exhaustion
Correct answer
Concurrency blocking, not resource exhaustion, is the primary issue to investigate
Question 8 A service principal must automate creation of Microsoft Entra users in Azure SQL Database. The security team rejects assigning broad directory-reader permissions when narrower Graph permissions can satisfy resolution. What principle should guide the configuration?
Answer choices
- A. Grant the Azure SQL server identity only the Microsoft Graph permissions required to resolve the target principals
- B. Grant Global Administrator to the deployment service principal
- C. Disable Entra principal validation and create unresolved names
- D. Grant db_owner to every new user so directory lookups succeed
Correct answer
Grant the Azure SQL server identity only the Microsoft Graph permissions required to resolve the target principals
Question 9 An Azure SQL Database has a 7-day PITR retention policy. Today the DBA changes it to 35 days and immediately tries to restore a point from 20 days ago. Why can that fail?
Answer choices
- A. TDE prevents restoring older recovery points
- B. Increasing retention today does not recreate recovery points that already aged out under the prior 7-day policy
- C. PITR never supports more than seven days
- D. The database must first be moved to another region
Correct answer
Increasing retention today does not recreate recovery points that already aged out under the prior 7-day policy
Question 10 A production Azure SQL Database occasionally regresses after a plan change. The DBA wants a service feature that can detect a plan regression and automatically return to a previously verified better plan when supported. Which capability is the direct fit?
Answer choices
- A. Azure SQL firewall rules
- B. Automatic tuning with FORCE_LAST_GOOD_PLAN
- C. Geo-restore
- D. Dynamic data masking
Correct answer
Automatic tuning with FORCE_LAST_GOOD_PLAN
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