An organization is developing an event-driven background service that processes image uploads. The application receives unpredictable traffic throughout the day and experiences extended periods of complete inactivity. The organization wants a cost-effective solution where compute charges occur only while the code is actively executing and resource costs drop to zero during idle periods. Which compute model and billing structure meets these requirements?

Serverless computing with a consumption-based plan: ### What Serverless Consumption-Based Billing Is **Serverless computing** is a cloud execution model where the cloud provider dynamically manages the provisioning, scaling, and maintenance of server infrastructure. Under a **consumption-based billing plan**, pricing is tied directly to the exact amount of compute resources and execution time consumed by the application rather than pre-allocated capacity. ### How It Meets the Requirements - **Zero cost when idle**: When the application is inactive and no events trigger execution, compute resources are automatically de-allocated or paused, resulting in no compute charges during idle periods. - **Pay-per-execution pricing**: The organization is billed strictly based on the number of executions, CPU, and memory utilized each second during active processing. - **Automatic scaling**: The infrastructure scales out instantly to match incoming image upload events and scales back down to zero when the queue empties. ### Key Advantages and Capabilities - **Fine-grained billing**: Resources are measured and billed at sub-second intervals or per-second consumption metrics. - **No server management**: Developers focus entirely on code and logic without provisioning, patching, or scaling virtual machines. - **Event-driven integration**: Automatically triggers code execution from HTTP requests, database events, queue messages, or file uploads. - **Optimal resource efficiency**: Eliminates wasted spend caused by over-provisioning infrastructure for peak loads. ### Why This Is Optimal For unpredictable, intermittent workloads, serverless consumption pricing provides the lowest total cost of ownership. Traditional hosting models require paying continuous runtime fees for idle servers, whereas consumption billing perfectly aligns infrastructure costs with real-time operational demand.

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Serverless Consumption Billing Model | Start here! Get your feet wet with the Microsoft cloud and begin your journey to earning your Microsoft Certified: Azure Fundamentals certification! | StudyCerts

AZ-900 Microsoft Azure Fundamentals Exam

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