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Microsoft DP-300 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Plan and configure high availability and disaster recovery	20–25%	- Configure high availability solutions 1. Test and monitor HA/DR operations 2. Implement failover groups and auto-failover 3. Configure Always On availability groups - Implement backup and restore 1. Configure automated backups and retention 2. Perform point-in-time and long-term retention restores 3. Manage backup storage and costs - Design HA/DR strategy 1. Define RPO and RTO requirements 2. Choose between built-in and custom solutions 3. Evaluate hybrid and cross-region options
Topic 2: Plan and implement data platform resources	15–20%	- Deploy database resources 1. Configure resources for scale and performance 2. Deploy Azure SQL Database, Managed Instance, and SQL Server on Azure VMs 3. Automate deployment using templates, PowerShell, or CLI - Implement migration strategies 1. Perform offline and online migrations 2. Migrate between Azure services or from on-premises 3. Evaluate migration requirements and strategies - Plan deployment of database offerings 1. Evaluate deployment options for Azure SQL services 2. Plan for scalability and performance requirements 3. Identify use cases for hybrid and multi-cloud solutions
Topic 3: Monitor and optimize operational resources	15–20%	- Monitor database performance and health 1. Set up alerts and notifications 2. Use Azure Monitor, SQL Insights, and metrics 3. Identify and diagnose performance issues - Automate maintenance and operations 1. Schedule and perform updates and patches 2. Manage database lifecycle operations 3. Automate tasks using jobs, scripts, or Logic Apps - Optimize resource consumption 1. Manage costs and licensing 2. Implement auto-scaling and elasticity 3. Adjust compute, storage, and tier settings
Topic 4: Implement a secure environment	20–25%	- Secure data at rest and in transit 1. Manage keys and certificates 2. Configure encryption for connections and data transfer 3. Implement Transparent Data Encryption - Implement compliance and security controls 1. Configure auditing and logging 2. Implement data masking and classification 3. Assess and remediate vulnerabilities - Configure authentication and authorization 1. Implement Microsoft Entra ID authentication 2. Manage database users, roles, and permissions 3. Apply least privilege principle
Topic 5: Optimize query performance	15–20%	- Manage workload performance 1. Implement partitioning and compression 2. Control resource usage and concurrency 3. Troubleshoot slow-running queries - Improve query performance 1. Optimize T-SQL code and constructs 2. Create and modify indexes 3. Use query store and performance tuning tools - Analyze query execution plans 1. Evaluate index usage and design 2. Identify bottlenecks and inefficiencies 3. Interpret execution plans and statistics

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Microsoft Administering Relational Databases on Microsoft Azure 認定 DP-300 試験問題 (Q290-Q295):

質問 # 290
You have an Azure SQL database named DB1 that contains two tables named Table1 and Table2. Both tables contain a column named a Column1. Column1 is used for joins by an application named App1.
You need to protect the contents of Column1 at rest, in transit, and in use.
How should you protect the contents of Column1? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

正解：

解説：

Reference:
https://docs.microsoft.com/en-us/sql/relational-databases/security/encryption/always-encrypted-database-engine

質問 # 291
You have an Azure SQL database.
You discover that the plan cache is full of compiled plans that were used only once.
You run the select * from sys.database_scoped_configurations Transact-SQL command and receive the results shown in the following table.

You need relieve the memory pressure.
What should you configure?

A. QUERY_OPTIMIZER_HOTFIXES
B. ACCELERATED_PLAN_FORCING
C. LEGACY_CARDINALITY_ESTIMATION
D. OPTIMIZE_FOR_AD_HOC_WORKLOADS

正解：D

解説：
OPTIMIZE_FOR_AD_HOC_WORKLOADS = { ON | OFF }
Enables or disables a compiled plan stub to be stored in cache when a batch is compiled for the first time. The default is OFF. Once the database scoped configuration OPTIMIZE_FOR_AD_HOC_WORKLOADS is enabled for a database, a compiled plan stub will be stored in cache when a batch is compiled for the first time.
Plan stubs have a smaller memory footprint compared to the size of the full compiled plan.
Reference:
https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-database-scoped-configuration-transact-sql

質問 # 292
You deploy an instance of SQL Server on Azure Virtual Machines: named SQL1 that hosts multiple databases.
You configure the full recovery model for all the databases.
You perform a full backup of the master database on SQL1.
You need to a perform an additional backup of the master database on SQL1. The solution must minimize how long it takes to perform the backup.
Which type of backup should you perform?

A. log
B. differential
C. full
D. tail-log

正解：C

解説：
Backups, only a full database backup can be performed on the master database.
https://learn.microsoft.com/en-us/sql/relational-databases/databases/master-database?view=sql-server-ver16

質問 # 293
You have SQL Server on an Azure virtual machine that contains a database named DB1.
You view a plan summary that shows the duration in milliseconds of each execution of query 1178902 as shown in the following exhibit:

What should you do to ensure that the query uses the execution plan which executes in the least amount of time?

A. Run the DBCC FREEPROCCACHE command.
B. Disable parameter sniffing.
C. Force the query execution plan for plan 1221065.
D. Force the query execution plan for plan 1220917.

正解：D

解説：
Reference:
https://docs.microsoft.com/en-us/sql/relational-databases/performance/query-store-usage-scenarios

質問 # 294
You have an Azure subscription that contains an Azure SQL database named DB1.
You need to recommend a high availability, disaster recovery (HA/DR) solution for DB1. The solution must meet the following requirements:
- Ensure that a recovery time objective (RTO) of less than five minutes can be met.
- Ensure that a recovery point objective (RPO) of less than 30 seconds
can be met.
- Ensure availability in the event of an Azure region outage.
What should you include in the recommendation?

A. geo-restore
B. Azure Site Recovery
C. zone redundancy
D. failover groups

正解：D

解説：
To protect an Azure SQL Database from a regional outage, you should implement disaster recovery solutions like active geo-replication or failover groups to create a secondary, readable replica in a different Azure region.
Azure failover groups for Azure SQL Database offer a Recovery Time Objective (RTO) of typically less than 60 seconds and a Recovery Point Objective (RPO) of 5 seconds. This means that, in the event of a failover, your database should be back online within a minute, and you might experience a maximum of 5 seconds of data loss.
Note:
Active Geo-Replication and Failover Groups:
Active Geo-Replication:
This feature allows you to create readable secondary databases in different Azure regions. It provides a mechanism for failover to the secondary database in case of a regional outage, minimizing downtime.
Failover Groups:
Failover groups simplify the management of geo-replicated databases, enabling automatic failover of multiple databases simultaneously. They also provide read-write and read-only listener endpoints that remain unchanged after failover, simplifying application updates.
Reference:
https://learn.microsoft.com/en-us/azure/azure-sql/database/failover-group-sql-db?view=azuresql

質問 # 295
......

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