Microsoft Azure Architect Technologies (AZ-300) Practice Exam

In which type of service does replication not require direct configuration, but rather focuses on partitioning and data consistency?

1. Azure Storage

2. Azure SQL Database

3. Azure Cosmos DB

4. Azure Recovery Services

The correct answer is: Azure Cosmos DB

The correct answer is Azure Cosmos DB, as it is designed to provide multi-region, globally distributed applications with built-in replication and partitioning features that do not require manual configuration by the user. Cosmos DB automatically manages data replication across partitions and regions, ensuring data consistency and availability while allowing developers to focus on the application logic rather than the underlying replication mechanisms. In Azure Cosmos DB, users can specify multiple consistency models, such as eventual consistency, strong consistency, and bounded staleness, which allow developers to choose the appropriate level of data consistency for their applications without needing to manage the replication process directly. This streamlining makes it easier to build applications that are resilient and responsive to user demand. In contrast, Azure Storage, while it provides redundancy and replication options, does require users to specify types of redundancy (like LRS, GRS, RA-GRS) and manage storage accounts directly. Azure SQL Database offers features for high availability and geo-replication, but the end user must configure these settings explicitly. Azure Recovery Services focuses on backup and disaster recovery solutions, which are different from the scalability and distribution features found in Cosmos DB. Therefore, the automated and managed replication along with built-in partitioning capabilities of Azure Cosmos DB uniquely positions it as the correct