When should you use Azure Functions instead of Azure Web Apps?

Azure Functions are particularly well-suited for scenarios where you are creating event-driven and serverless applications that require minimal infrastructure management. This service allows developers to focus on writing the essential code that responds to events without worrying about the underlying servers or infrastructure, as Azure takes care of scaling, provisioning, and managing the servers.

In an event-driven architecture, Azure Functions can automatically execute code in response to triggers such as HTTP requests, changes in data, or messages from an event hub. This means that developers can efficiently build applications that react to real-time data or user actions without the need for extensive infrastructure setup.

This serverless approach significantly reduces operational overhead and allows for efficient resource usage, with costs being based on execution time rather than reserved capacity. This is particularly beneficial for scenarios where application demands may vary greatly over time, enabling developers to scale their applications seamlessly in response to fluctuating workloads.

The other choices do not align with the core advantages of Azure Functions:

• More control over the infrastructure is a key trait of Azure Web Apps, where you have more options to customize and manage the environment.
• Static websites generally require Azure Static Web Apps or similar services rather than Azure Functions.
• Hosting large applications with complex user interfaces demands the capabilities of Azure Web Apps,