Microsoft Azure Architect Technologies (AZ-300) Practice Exam

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Prepare for the Microsoft Azure Architect Technologies Exam with comprehensive quizzes, flashcards, and simulated questions. Master the skills required to design solutions on Azure and earn your certification efficiently!

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Which Azure service is known for its globally distributed database system?

Azure Storage
Azure SQL Database
Azure Cosmos DB
Azure Blob Storage

The correct answer is: Azure Cosmos DB

Azure Cosmos DB is recognized for its globally distributed database system, designed to provide high availability and low latency, regardless of the user's location. It supports multiple data models, including document, key-value, graph, and column-family, which makes it versatile for various application needs. One of the key features of Azure Cosmos DB is its multi-master replication, allowing for writes to be made at multiple regions seamlessly. This capability ensures that applications can deliver consistent performance, as read and write operations can occur close to where users are located. Additionally, Cosmos DB offers multiple consistency models that help developers choose the right trade-offs between availability and consistency based on their application requirements. In contrast, Azure Storage is primarily focused on storage solutions like blobs, files, queues, and tables, rather than serving as a globally distributed database. Azure SQL Database, while it does offer a platform for relational database solutions and geo-replication, lacks the multi-model capabilities and global distribution features that Cosmos DB provides. Azure Blob Storage also centers around storing large amounts of unstructured data and doesn't serve as a fully-fledged database system. Thus, Azure Cosmos DB stands out as the service that specifically caters to the needs of globally distributed applications, making it the correct answer.