Developing Solutions for Microsoft Azure (AZ-204) Practice Exam

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What type of Azure Functions allows you to set autoscaling rules based on predictive usage?

Consumption plan
App service plan
Standalone plan
In-process plan

The correct answer is: App service plan

The App Service plan is the type of Azure Functions that allows you to set autoscaling rules based on predictive usage. This plan provides more control over the underlying resources, including the ability to scale out or in based on specific metrics or schedules. In an App Service plan, you can configure autoscaling rules that adjust the number of instances based on anticipated workflow and load, enabling more efficient resource management during peak usage times. The other options are not focused on predictive scaling: - The Consumption plan automatically scales based on demand, but it does not offer the same level of customization for scaling rules as the App Service plan. It is designed for short-lived functions that can scale out quickly but are limited to the platform's default performance and scaling behavior. - The Standalone plan does not exist within the context of Azure Functions, as Azure does not offer a specific plan termed "Standalone." - The In-process plan is related to the execution model of Azure Functions, indicating how functions execute within the hosting environment. However, it does not pertain to autoscaling options. Choosing the App Service plan allows developers to effectively leverage advanced scaling capabilities tailored to their application's needs.