Download Administering Relational Databases on Microsoft Azure.DP-300.VCEplus.2020-06-22.39q.vcex

Vendor: Microsoft
Exam Code: DP-300
Exam Name: Administering Relational Databases on Microsoft Azure
Date: Jun 22, 2020
File Size: 2 MB
Downloads: 1

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Question 1
You have an Azure SQL database that contains a table named factSales. FactSales contains the columns shown in the following table.
 
FactSales has 6 billion rows and is loaded nightly by using a batch process.
Which type of compression provides the greatest space reduction for the database?
  1. page compression
  2. row compression
  3. columnstore compression
  4. columnstore archival compression
Correct answer: D
Explanation:
Columnstore tables and indexes are always stored with columnstore compression. You can further reduce the size of columnstore data by configuring an additional compression called archival compression.Note: Columnstore — The columnstore index is also logically organized as a table with rows and columns, but the data is physically stored in a column-wise data format.Incorrect Answers:B: Rowstore — The rowstore index is the traditional style that has been around since the initial release of SQL Server.For rowstore tables and indexes, use the data compression feature to help reduce the size of the database.Reference: https://docs.microsoft.com/en-us/sql/relational-databases/data-compression/data-compression
Columnstore tables and indexes are always stored with columnstore compression. You can further reduce the size of columnstore data by configuring an additional compression called archival compression.
Note: Columnstore — The columnstore index is also logically organized as a table with rows and columns, but the data is physically stored in a column-wise data format.
Incorrect Answers:
B: Rowstore — The rowstore index is the traditional style that has been around since the initial release of SQL Server.
For rowstore tables and indexes, use the data compression feature to help reduce the size of the database.
Reference: https://docs.microsoft.com/en-us/sql/relational-databases/data-compression/data-compression
Question 2
You have a Microsoft SQL Server 2019 instance in an on-premises datacenter. The instance contains a 4-TB database named DB1.
You plan to migrate DB1 to an Azure SQL Database managed instance.
What should you use to minimize downtime and data loss during the migration?
  1. distributed availability groups
  2. database mirroring
  3. log shipping
  4. Database Migration Assistant
Correct answer: A
Explanation:
The Data Migration Assistant (DMA) helps you upgrade to a modern data platform by detecting compatibility issues that can impact database functionality in your new version of SQL Server or Azure SQL Database. DMA recommends performance and reliability improvements for your target environment and allows you to move your schema, data, and uncontained objects from your source server to your target server.Note: SQL Managed Instance supports the following database migration options (currently these are the only supported migration methods):Azure Database Migration Service - migration with near-zero downtime.Native RESTORE DATABASE FROM URL - uses native backups from SQL Server and requires some downtime.Reference: https://docs.microsoft.com/en-us/sql/dma/dma-overview
The Data Migration Assistant (DMA) helps you upgrade to a modern data platform by detecting compatibility issues that can impact database functionality in your new version of SQL Server or Azure SQL Database. DMA recommends performance and reliability improvements for your target environment and allows you to move your schema, data, and uncontained objects from your source server to your target server.
Note: SQL Managed Instance supports the following database migration options (currently these are the only supported migration methods):
  • Azure Database Migration Service - migration with near-zero downtime.
  • Native RESTORE DATABASE FROM URL - uses native backups from SQL Server and requires some downtime.
Reference: https://docs.microsoft.com/en-us/sql/dma/dma-overview
Question 3
You have an on-premises Microsoft SQL Server 2016 server named Server1 that contains a database named DB1.
You need to perform an online migration of DB1 to an Azure SQL Database managed instance by using Azure Database Migration Service.
How should you configure the backup of DB1? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Correct answer: To work with this question, an Exam Simulator is required.
Explanation:
Box 1: Full and log backups onlyMake sure to take every backup on a separate backup media (backup files). Azure Database Migration Service doesn't support backups that are appended to a single backup file. Take full backup and log backups to separate backup files.Box 2: WITH CHECKSUM Azure Database Migration Service uses the backup and restore method to migrate your on-premises databases to SQL Managed Instance. Azure Database Migration Service only supports backups created using checksum.Incorrect Answers:NOINIT Indicates that the backup set is appended to the specified media set, preserving existing backup sets. If a media password is defined for the media set, the password must be supplied. NOINIT is the default.UNLOADSpecifies that the tape is automatically rewound and unloaded when the backup is finished. UNLOAD is the default when a session begins.Reference: https://docs.microsoft.com/en-us/azure/dms/known-issues-azure-sql-db-managed-instance-online
Box 1: Full and log backups only
Make sure to take every backup on a separate backup media (backup files). Azure Database Migration Service doesn't support backups that are appended to a single backup file. Take full backup and log backups to separate backup files.
Box 2: WITH CHECKSUM Azure Database Migration Service uses the backup and restore method to migrate your on-premises databases to SQL Managed Instance. Azure Database Migration Service only supports backups created using checksum.
Incorrect Answers:
NOINIT Indicates that the backup set is appended to the specified media set, preserving existing backup sets. If a media password is defined for the media set, the password must be supplied. NOINIT is the default.
UNLOAD
Specifies that the tape is automatically rewound and unloaded when the backup is finished. UNLOAD is the default when a session begins.
Reference: https://docs.microsoft.com/en-us/azure/dms/known-issues-azure-sql-db-managed-instance-online
Question 4
You have 20 Azure SQL databases provisioned by using the vCore purchasing model.
You plan to create an Azure SQL Database elastic pool and add the 20 databases.
Which three metrics should you use to size the elastic pool to meet the demands of your workload? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
  1. total size of all the databases
  2. geo-replication support
  3. number of concurrently peaking databases * peak CPU utilization per database
  4. maximum number of concurrent sessions for all the databases
  5. total number of databases * average CPU utilization per database
Correct answer: ACE
Explanation:
CE: Estimate the vCores needed for the pool as follows:For vCore-based purchasing model: MAX(<Total number of DBs X average vCore utilization per DB>, <Number of concurrently peaking DBs X Peak vCore utilization per DB) A: Estimate the storage space needed for the pool by adding the number of bytes needed for all the databases in the pool.Reference: https://docs.microsoft.com/en-us/azure/azure-sql/database/elastic-pool-overview
CE: Estimate the vCores needed for the pool as follows:
For vCore-based purchasing model: MAX(<Total number of DBs X average vCore utilization per DB>, <Number of concurrently peaking DBs X Peak vCore utilization per DB) A: Estimate the storage space needed for the pool by adding the number of bytes needed for all the databases in the pool.
Reference: https://docs.microsoft.com/en-us/azure/azure-sql/database/elastic-pool-overview
Question 5
You have a new Azure SQL database. The database contains a column that stores confidential information.
You need to track each time values from the column are returned in a query. The tracking information must be stored for 365 days from the date the query was executed.
Which three actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
  1. Turn on auditing and write audit logs to an Azure Storage account.
  2. Add extended properties to the column.
  3. Turn on Advanced Data Security for the Azure SQL server.
  4. Apply sensitivity labels named Highly Confidential to the column.
  5. Turn on Azure Advanced Threat Protection (ATP).
Correct answer: ACD
Explanation:
C: Advanced Data Security (ADS) is a unified package for advanced SQL security capabilities. ADS is available for Azure SQL Database, Azure SQL Managed Instance, and Azure Synapse Analytics. It includes functionality for discovering and classifying sensitive dataD: You can apply sensitivity-classification labels persistently to columns by using new metadata attributes that have been added to the SQL Server database engine. This metadata can then be used for advanced, sensitivity-based auditing and protection scenarios.A: An important aspect of the information-protection paradigm is the ability to monitor access to sensitive data. Azure SQL Auditing has been enhanced to include a new field in the audit log called data_sensitivity_information. This field logs the sensitivity classifications (labels) of the data that was returned by a query. Here's an example:Reference: https://docs.microsoft.com/en-us/azure/azure-sql/database/data-discovery-and-classification-overview
C: Advanced Data Security (ADS) is a unified package for advanced SQL security capabilities. ADS is available for Azure SQL Database, Azure SQL Managed Instance, and Azure Synapse Analytics. It includes functionality for discovering and classifying sensitive data
D: You can apply sensitivity-classification labels persistently to columns by using new metadata attributes that have been added to the SQL Server database engine. This metadata can then be used for advanced, sensitivity-based auditing and protection scenarios.
A: An important aspect of the information-protection paradigm is the ability to monitor access to sensitive data. Azure SQL Auditing has been enhanced to include a new field in the audit log called data_sensitivity_information. This field logs the sensitivity classifications (labels) of the data that was returned by a query. Here's an example:
Reference: https://docs.microsoft.com/en-us/azure/azure-sql/database/data-discovery-and-classification-overview
Question 6
You have an Azure virtual machine named VM1 on a virtual network named VNet1. Outbound traffic from VM1 to the internet is blocked.
You have an Azure SQL database named SqlDb1 on a logical server named SqlSrv1.
You need to implement connectivity between VM1 and SqlDb1 to meet the following requirements:
  • Ensure that all traffic to the public endpoint of SqlSrv1 is blocked. 
  • Minimize the possibility of VM1 exfiltrating data stored in SqlDb1.
What should you create on VNet1?
  1. a VPN gateway
  2. a service endpoint
  3. a private link
  4. an ExpressRoute gateway 
Correct answer: C
Explanation:
Azure Private Link enables you to access Azure PaaS Services (for example, Azure Storage and SQL Database) and Azure hosted customer-owned/partner services over a private endpoint in your virtual network.Traffic between your virtual network and the service travels the Microsoft backbone network. Exposing your service to the public internet is no longer necessary.Reference: https://docs.microsoft.com/en-us/azure/private-link/private-link-overview
Azure Private Link enables you to access Azure PaaS Services (for example, Azure Storage and SQL Database) and Azure hosted customer-owned/partner services over a private endpoint in your virtual network.
Traffic between your virtual network and the service travels the Microsoft backbone network. Exposing your service to the public internet is no longer necessary.
Reference: https://docs.microsoft.com/en-us/azure/private-link/private-link-overview
Question 7
You have SQL Server on an Azure virtual machine that contains a database named DB1. DB1 contains a table named CustomerPII.
You need to record whenever users query the CustomerPII table.
Which two options should you enable? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
  1. server audit specification
  2. SQL Server audit
  3. database audit specification
  4. a server principal
Correct answer: AC
Explanation:
An auditing policy can be defined for a specific database or as a default server policy in Azure (which hosts SQL Database or Azure Synapse):A server policy applies to all existing and newly created databases on the server.If server auditing is enabled, it always applies to the database. The database will be audited, regardless of the database auditing settings.Enabling auditing on the database, in addition to enabling it on the server, does not override or change any of the settings of the server auditing. Both audits will exist side by side.Note:The Server Audit Specification object belongs to an audit.A Database Audit Specification defines which Audit Action Groups will be audited for the specific database in which the specification is created.Reference: https://docs.microsoft.com/en-us/azure/azure-sql/database/auditing-overview
An auditing policy can be defined for a specific database or as a default server policy in Azure (which hosts SQL Database or Azure Synapse):
  • A server policy applies to all existing and newly created databases on the server.
  • If server auditing is enabled, it always applies to the database. The database will be audited, regardless of the database auditing settings.
  • Enabling auditing on the database, in addition to enabling it on the server, does not override or change any of the settings of the server auditing. Both audits will exist side by side.
Note:
The Server Audit Specification object belongs to an audit.
A Database Audit Specification defines which Audit Action Groups will be audited for the specific database in which the specification is created.
Reference: https://docs.microsoft.com/en-us/azure/azure-sql/database/auditing-overview
Question 8
You have an Azure virtual machine based on a custom image named VM1.
VM1 hosts an instance of Microsoft SQL Server 2019 Standard.
You need to automate the maintenance of VM1 to meet the following requirements:
  • Automate the patching of SQL Server and Windows Server.
  • Automate full database backups and transaction log backups of the databases on VM1.
  • Minimize administrative effort.
What should you do first?
  1. Enable a system-assigned managed identity for VM1
  2. Register VM1 to the Microsoft.Sql resource provider
  3. Install an Azure virtual machine Desired State Configuration (DSC) extension on VM1
  4. Register VM1 to the Microsoft.SqlVirtualMachine resource provider
Correct answer: B
Explanation:
Automated Patching depends on the SQL Server infrastructure as a service (IaaS) Agent Extension. The SQL Server IaaS Agent Extension (SqlIaasExtension) runs on Azure virtual machines to automate administration tasks. The SQL Server IaaS extension is installed when you register your SQL Server VM with the SQL Server VM resource provider.Reference: https://docs.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/sql-server-iaas-agent-extension-automate-management 
Automated Patching depends on the SQL Server infrastructure as a service (IaaS) Agent Extension. The SQL Server IaaS Agent Extension (SqlIaasExtension) runs on Azure virtual machines to automate administration tasks. The SQL Server IaaS extension is installed when you register your SQL Server VM with the SQL Server VM resource provider.
Reference: https://docs.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/sql-server-iaas-agent-extension-automate-management 
Question 9
You receive numerous alerts from Azure Monitor for an Azure SQL database.
You need to reduce the number of alerts. You must only receive alerts if there is a significant change in usage patterns for an extended period.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
  1. Set Threshold Sensitivity to High
  2. Set the Alert logic threshold to Dynamic
  3. Set the Alert logic threshold to Static
  4. Set Threshold Sensitivity to Low
  5. Set Force Plan to On
Correct answer: BD
Explanation:
B: Dynamic Thresholds continuously learns the data of the metric series and tries to model it using a set of algorithms and methods. It detects patterns in the data such as seasonality (Hourly / Daily / Weekly), and is able to handle noisy metrics (such as machine CPU or memory) as well as metrics with low dispersion (such as availability and error rate).D: Alert threshold sensitivity is a high-level concept that controls the amount of deviation from metric behavior required to trigger an alert.Low - The thresholds will be loose with more distance from metric series pattern. An alert rule will only trigger on large deviations, resulting in fewer alerts.Incorrect Answers:A: High - The thresholds will be tight and close to the metric series pattern. An alert rule will be triggered on the smallest deviation, resulting in more alerts.Reference: https://docs.microsoft.com/en-us/azure/azure-monitor/platform/alerts-dynamic-thresholds
B: Dynamic Thresholds continuously learns the data of the metric series and tries to model it using a set of algorithms and methods. It detects patterns in the data such as seasonality (Hourly / Daily / Weekly), and is able to handle noisy metrics (such as machine CPU or memory) as well as metrics with low dispersion (such as availability and error rate).
D: Alert threshold sensitivity is a high-level concept that controls the amount of deviation from metric behavior required to trigger an alert.
Low - The thresholds will be loose with more distance from metric series pattern. An alert rule will only trigger on large deviations, resulting in fewer alerts.
Incorrect Answers:
A: High - The thresholds will be tight and close to the metric series pattern. An alert rule will be triggered on the smallest deviation, resulting in more alerts.
Reference: https://docs.microsoft.com/en-us/azure/azure-monitor/platform/alerts-dynamic-thresholds
Question 10
You have an Azure SQL database named sqldb1.
You need to minimize the amount of space by the data and log files of sqldb1.
What should you run?
  1. DBCC SHRINKDATABASE
  2. sp_clean_db_free_space
  3. sp_clean_db_file_free_space
  4. DBCC SHRINKFILE
Correct answer: A
Explanation:
DBCC SHRINKDATABASE shrinks the size of the data and log files in the specified database.Incorrect Answers:D: To shrink one data or log file at a time for a specific database, execute the DBCC SHRINKFILE command.Reference:https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-shrinkdatabase-transact-sql 
DBCC SHRINKDATABASE shrinks the size of the data and log files in the specified database.
Incorrect Answers:
D: To shrink one data or log file at a time for a specific database, execute the DBCC SHRINKFILE command.
Reference:
https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-shrinkdatabase-transact-sql 
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