Microsoft Azure Architect Technologies (AZ-300) Practice Exam

Which Azure storage service ensures reliable messaging for microservices applications?

1. File

2. Blob

3. Queue

4. Table

The correct answer is: Queue

The correct answer is Queue because it is designed specifically to facilitate reliable messaging between different components of applications, particularly in microservices architectures. Azure Queue Storage provides a simple and cost-effective way to manage message queues and allows decoupling of application components, ensuring that messages are delivered reliably even if some part of the system is temporarily unavailable. In microservices applications, components often need to communicate asynchronously, and using a queue ensures that messages are stored until they can be processed, avoiding data loss and allowing for greater resilience and scalability. This is particularly valuable in scenarios where services might experience varying loads and processing times. Other Azure storage services, such as File, Blob, and Table, serve different purposes. File Storage is primarily for file shares, Blob Storage is used for storing unstructured data like images and videos, and Table Storage is for structured NoSQL data. None of these services are specifically designed for ensuring reliable messaging, making Queue the most suitable choice for this requirement.