Microsoft Azure Architect Design (AZ-304) Practice Test

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Which deployment option should you choose to design a highly available Azure SQL database with no data loss during failover?

Azure SQL Database Standard
Azure SQL Database Business Critical
Azure SQL Database Managed Instance Business Critical
Azure SQL Database Basic

The correct answer is: Azure SQL Database Standard

To design a highly available Azure SQL database with no data loss during failover, the best choice is Azure SQL Database Business Critical. This tier offers features like in-memory OLTP and high availability through Always On availability groups, ensuring that your database remains available and consistent even during failover scenarios. Its architecture is specifically designed to handle high transaction volumes while providing low latency and resiliency against hardware failures. The Business Critical tier's capabilities make it ideal for scenarios where the database must not only be available but also protect against any potential data loss during failover processes. Choices like Azure SQL Database Standard or Basic do not provide the same level of high availability or durability, making them less suitable for ensuring no data loss in critical applications. Managed Instance Business Critical is also a solid option, but the focus here is on Azure SQL Database as a standalone service. Choosing the Business Critical tier effectively combines both high availability and high performance, aligning with the requirement for an Azure SQL Database solution designed for maximum uptime and data integrity.