What is a defining feature of Azure Functions?

Azure Functions are a serverless compute service that allows you to run small pieces of code (functions) without explicitly provisioning or managing infrastructure. The defining feature is that these functions execute in response to specific triggers or events, such as an HTTP request, a message arriving in a queue, a timer, or a file upload. This event-driven model is central to serverless computing. Incorrect options: Requires provisioning virtual machines: This is incorrect. Azure Functions are serverless, meaning Microsoft manages the underlying infrastructure, and you don't provision VMs. Hosts persistent container services: While Azure does offer container services (like Azure Container Instances or Azure Kubernetes Service), Azure Functions are primarily for event-driven code execution, not for hosting persistent containerized applications in the same way. Provides direct file system access: While functions can interact with storage, they typically don't offer direct, persistent, and broad file system access in the way a traditional server would. Their execution environment is ephemeral.