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Microsoft DP-300 Practice Test

Microsoft DP-300 Practice Test

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Today's 10 Microsoft DP-300 questions

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Question 1 of 10
Objective Plan and implement a migration strategy Plan and implement data platform resources (15%-20%)

A database must be relocated from one Azure SQL Managed Instance to another while minimizing application downtime. After validation, the old source database must no longer remain as an independently writable copy. Which operation aligns with that lifecycle?

Concept tested:
Source:Copy or move a database - Azure SQL Managed Instance
Question 2 of 10
Objective Implement security for data at rest and data in transit Implement a secure environment (20%-25%)

A database stores an especially sensitive identifier. The organization wants broad at-rest encryption for all database files and an additional control so the sensitive column has stronger confidentiality than ordinary TDE provides. Which layered design is conceptually correct?

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 updates statistics and reads a status table. It does not alter schema or manage users. The job identity currently has db_owner on every target. What hardening change is most appropriate?

Concept tested:
Question 4 of 10
Objective Configure HA/DR for database solutions Plan and configure a high availability and disaster recovery (HA/DR) environment (20%-25%)

A failover group hosts a customer-facing database. The organization wants service-managed failover after a regional outage but requires a grace period to reduce the chance of failing over for short transient events. Which setting should be reviewed?

Concept tested:
Question 5 of 10
Objective Configure database solutions for optimal performance Monitor, configure, and optimize database resources (20%-25%)

One database on a shared SQL Server instance needs MAXDOP = 2 because of a specific workload. Other databases should keep the server-wide MAXDOP. Which mechanism provides the required scope?

Concept tested:
Question 6 of 10
Objective Implement compliance controls for sensitive data Implement a secure environment (20%-25%)

A database has accurate sensitivity labels, yet ordinary users can still query an unmasked SSN column because permissions were never changed. Which conclusion is correct?

Concept tested:
Question 7 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?

Concept tested:
Question 8 of 10
Objective Configure resources for scale and performance Plan and implement data platform resources (15%-20%)

A partitioned sales table uses a monthly partition scheme. A large nonclustered index is created on a single filegroup instead of the partition scheme. The team expects to switch out one month with minimal maintenance. What design issue should be corrected before relying on partition switching?

Concept tested:
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%)

A legal-hold requirement begins next month and will require 28 days of PITR history immediately on the effective date. The database currently retains seven days. When should the team extend retention?

Concept tested:
Question 10 of 10
Objective Monitor resource activity and performance Monitor, configure, and optimize database resources (20%-25%)

A platform team manages 180 Azure SQL databases and 25 managed instances across subscriptions. It wants near-real-time, detailed database monitoring collected into a central store so the team can analyze fleet-wide performance without building a custom collector for every database. Which service should it evaluate?

Concept tested:
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The free daily Microsoft DP-300 set includes crawlable question text, answer choices, correct answer labels, objective mapping, and source links. Only the first SEO card includes answer explanations and any extra learning features. Pro-only bank questions stay locked; this section mirrors only the 10 free daily questions already shown on this page.

Question 1 A database must be relocated from one Azure SQL Managed Instance to another while minimizing application downtime. After validation, the old source database must no longer remain as an independently writable copy. Which operation aligns with that lifecycle?

Answer choices

  1. A. Use an online database copy and leave both databases writable indefinitely, within the stated policy framework.
  2. B. Use long-term retention restore and expect it to maintain continuous source synchronization, as the selected response to the described condition.
  3. C. Use the Managed Instance online database move workflow and complete the move after cutover validation, for this scenario.
  4. D. Change only the DNS name of the source instance, for the described technical objective and its associated operational control requirements, as configured.

Correct answer

Use the Managed Instance online database move workflow and complete the move after cutover validation, for this scenario.

The move workflow is designed to relocate a database; completing it removes the source rather than leaving two independent copies. Source basis: Managed Instance supports online database copy and move operations between instances. A copy leaves the source database in place; completing a move removes the source, and recovery history considerations differ from ordinary restore.

Wrong-answer review

  • A. Use an online database copy and leave both databases writable indefinitely, within the stated policy framework.: Incorrect. A copy intentionally leaves the source and does not enforce the desired relocation lifecycle.
  • B. Use long-term retention restore and expect it to maintain continuous source synchronization, as the selected response to the described condition.: Incorrect. LTR restores a retained backup and is not an online move synchronization workflow.
  • D. Change only the DNS name of the source instance, for the described technical objective and its associated operational control requirements, as configured.: Incorrect. DNS changes do not relocate the database to another Managed Instance.

Extra learning features

Why candidates miss this

The distractors 'Use an online database copy and leave both databases writable indefinitely' and 'Change only the DNS name of the source instance' are tempting because they represent simpler, albeit less robust, migration strategies. The decisive clue is the requirement to 'minimize application downtime,' which directly contradicts the approach of maintaining two writable copies or simply changing DNS, both of which would necessitate a lengthy cutover process. Likely wrong answer: Use an online database copy and leave both databases writable indefinitely Review focus: Copy or move a database - Azure SQL Managed Instance

Interview question

Q: The Managed Instance online database move workflow is designed to relocate a database; completing it removes the source rather than leaving two independent copies. This approach minimizes application downtime by avoiding a traditional, lengthy cutover process. The workflow's automated nature reduces the risk of human error during the migration, ensuring data integrity and a smoother transition for the application. Strong answer: The Managed Instance online database move workflow is designed to relocate a database; completing it removes the source rather than leaving two independent copies.

  • workflow
  • cutover
  • data integrity
  • application downtime

Caution: This question is focused on the workflow, not the underlying technology.

Objective/domain: Plan and implement data platform resources (15%-20%)

Source: Copy or move a database - Azure SQL Managed Instance

Question 2 A database stores an especially sensitive identifier. The organization wants broad at-rest encryption for all database files and an additional control so the sensitive column has stronger confidentiality than ordinary TDE provides. Which layered design is conceptually correct?

Answer choices

  1. A. Use partitioning because separate partitions are cryptographically isolated, as the selected approach for the stated technical and business outcome, for review.
  2. B. Replace TDE with a firewall rule, for the described technical objective and its associated operational control requirements, as configured.
  3. C. Use Query Store to obfuscate the column, for the described technical objective and its associated operational control requirements, for the described technical objective.
  4. D. Keep TDE for database-at-rest protection and use a column-focused encryption capability such as Always Encrypted for the sensitive values, for the described technical objective.

Correct answer

Keep TDE for database-at-rest protection and use a column-focused encryption capability such as Always Encrypted for the sensitive values, for the described technical objective.

Objective/domain: Implement a secure environment (20%-25%)

Source: Azure SQL security capabilities

Question 3 An Elastic Job updates statistics and reads a status table. It does not alter schema or manage users. The job identity currently has db_owner on every target. What hardening change is most appropriate?

Answer choices

  1. A. Replace db_owner with only the permissions required by the job's T-SQL operations, for the described technical objective.
  2. B. Grant sysadmin on the logical server, for the described technical objective and its associated operational control requirements, as described.
  3. C. Keep db_owner because centralized jobs inherently require ownership, for the affected environment.
  4. D. Disable auditing so the job executes faster, for the stated security, delivery, and accountability requirements.

Correct answer

Replace db_owner with only the permissions required by the job's T-SQL operations, for the described technical objective.

Objective/domain: Configure and manage automation of tasks (15%-20%)

Source: Elastic jobs in Azure SQL Database

Question 4 A failover group hosts a customer-facing database. The organization wants service-managed failover after a regional outage but requires a grace period to reduce the chance of failing over for short transient events. Which setting should be reviewed?

Answer choices

  1. A. PITR retention, under the documented operational and governance requirements.
  2. B. The failover group's automatic failover policy and grace period, for the stated requirement.
  3. C. Database classification labels, as the selected response to the described condition.
  4. D. Index fill factor, for the described technical objective and its associated operational control requirements.

Correct answer

The failover group's automatic failover policy and grace period, for the stated requirement.

Objective/domain: Plan and configure a high availability and disaster recovery (HA/DR) environment (20%-25%)

Source: Failover groups overview - Azure SQL Database

Question 5 One database on a shared SQL Server instance needs MAXDOP = 2 because of a specific workload. Other databases should keep the server-wide MAXDOP. Which mechanism provides the required scope?

Answer choices

  1. A. Change the instance-wide max degree of parallelism to 2, for consideration.
  2. B. Create a server firewall rule with MAXDOP = 2, within the stated policy framework.
  3. C. Change the backup retention policy, for the described technical objective and its associated operational control requirements.
  4. D. Set MAXDOP with ALTER DATABASE SCOPED CONFIGURATION in that database, under the stated decision criteria.

Correct answer

Set MAXDOP with ALTER DATABASE SCOPED CONFIGURATION in that database, under the stated decision criteria.

Objective/domain: Monitor, configure, and optimize database resources (20%-25%)

Source: ALTER DATABASE SCOPED CONFIGURATION

Question 6 A database has accurate sensitivity labels, yet ordinary users can still query an unmasked SSN column because permissions were never changed. Which conclusion is correct?

Answer choices

  1. A. TDE must be disabled before labels enforce access, for the described technical objective and its associated operational control requirements, as configured.
  2. B. The labels are broken because a label automatically denies SELECT, for the described technical objective and its associated operational control requirements, under the stated decision criteria.
  3. C. Moving the database to a different region will activate label enforcement, under the described implement a secure environment (20%-25%) criteria.
  4. D. Classification provides discovery and governance metadata; separate authorization or protection controls are required to restrict the data, within the described operational context.

Correct answer

Classification provides discovery and governance metadata; separate authorization or protection controls are required to restrict the data, within the described operational context.

Objective/domain: Implement a secure environment (20%-25%)

Source: Data discovery and classification for Azure SQL

Question 7 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

  1. A. The transaction-log backup schedule, as the selected approach for the stated technical and business outcome.
  2. B. The job owner and effective execution/security context of the scheduled step versus the interactive session, under organization-wide implementation-governance requirements.
  3. C. The database file size, for the described technical objective and its associated operational control requirements, in context.
  4. D. The TDE encryption state, for the described technical objective and its associated operational control requirements, for this requirement.

Correct answer

The job owner and effective execution/security context of the scheduled step versus the interactive session, under organization-wide implementation-governance requirements.

Objective/domain: Configure and manage automation of tasks (15%-20%)

Source: SQL Server Agent

Question 8 A partitioned sales table uses a monthly partition scheme. A large nonclustered index is created on a single filegroup instead of the partition scheme. The team expects to switch out one month with minimal maintenance. What design issue should be corrected before relying on partition switching?

Answer choices

  1. A. Rebuild the index with a lower fill factor only, under the documented operational and governance requirements.
  2. B. Move every partition into tempdb before the switch, as the primary implementation for the described business requirement.
  3. C. Replace the partition function with a CHECK constraint on EventDate, for the stated security, delivery, and accountability requirements.
  4. D. Align the relevant nonclustered index with the table's partition scheme and partitioning column

Correct answer

Align the relevant nonclustered index with the table's partition scheme and partitioning column

Objective/domain: Plan and implement data platform resources (15%-20%)

Source: Partitioned tables and indexes

Question 9 A legal-hold requirement begins next month and will require 28 days of PITR history immediately on the effective date. The database currently retains seven days. When should the team extend retention?

Answer choices

  1. A. On the effective date after the first restore request arrives, under the stated technical, operational, and governance constraints.
  2. B. Only after a regional outage, within the documented operational, security, ownership, and validation requirements.
  3. C. After reducing the database's vCores, for the required operational result and control objective.
  4. D. Before the requirement becomes effective, early enough for the longer window to accumulate, under the proposed approach.

Correct answer

Before the requirement becomes effective, early enough for the longer window to accumulate, under the proposed approach.

Objective/domain: Plan and configure a high availability and disaster recovery (HA/DR) environment (20%-25%)

Source: Change automated backup settings - Azure SQL Database

Question 10 A platform team manages 180 Azure SQL databases and 25 managed instances across subscriptions. It wants near-real-time, detailed database monitoring collected into a central store so the team can analyze fleet-wide performance without building a custom collector for every database. Which service should it evaluate?

Answer choices

  1. A. Data discovery and classification, within this design.
  2. B. Azure SQL failover groups, within the described operational context.
  3. C. DACPAC publishing, in the described situation.
  4. D. Database Watcher, within this design.

Correct answer

Database Watcher, within this design.

Objective/domain: Monitor, configure, and optimize database resources (20%-25%)

Source: Database watcher overview

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