Download Administering Relational Databases on Microsoft Azure.PrepAway.DP-300.2021-04-16.7e.39q.vcex

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

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

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

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

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

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

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

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

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

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