Which Azure service lets developers build serverless applications that execute code automatically when events occur, such as file uploads to Blob Storage? Learn how Azure Functions delivers event-driven, scalable, and cost-effective serverless computing.
Table of Contents
Question
A developer needs to build a serverless application that runs code in response to events, such as a new file being uploaded to Azure Blob Storage. Which service should they use?
A. Azure Functions
B. Azure Virtual Machines
C. Azure App Service
D. Azure Logic Apps
E. Azure Kubernetes Service
Answer
A. Azure Functions
Explanation
Azure Functions is a serverless compute service that allows developers to run event-driven code without managing infrastructure. It is ideal for processing events, such as those from Azure Blob Storage.
The best Azure service for building a serverless application that runs code in response to events—such as a new file being uploaded to Azure Blob Storage—is Azure Functions.
Azure Functions is a serverless compute service that enables developers to write and deploy code that automatically executes in response to a wide range of events, including HTTP requests, timer schedules, queue messages, and changes in Azure services like Blob Storage, Cosmos DB, and Event Grid.
- Event-Driven Architecture: Functions can be triggered by events such as a new file being uploaded to Blob Storage. When such an event occurs, Azure automatically runs the specified function code without any need for manual intervention or server management.
- Scalability: Azure Functions automatically scales to handle the number of incoming events, ensuring your application remains responsive regardless of load.
- Cost-Effectiveness: You are only billed for the compute resources consumed while your code is running, making it an efficient solution for unpredictable or bursty workloads.
- Integration: Functions support bindings and triggers, making it easy to connect with other Azure services and external systems without writing extensive integration code.
- Supported Languages: Developers can use C#, JavaScript, Python, PowerShell, Java, and more.
Example Scenario:
When a file is uploaded to Azure Blob Storage, a Blob Trigger in Azure Functions detects the event and automatically executes code to process the file—such as resizing an image, extracting metadata, or moving the file to another location.
Azure Functions is a serverless, event-driven compute service that runs code in response to events like file uploads in Blob Storage, allowing developers to build scalable, automated solutions without managing infrastructure.
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