Microsoft Azure Architect Design (AZ-304) Practice Test

Does deploying a virtual machine scale set that uses autoscaling meet the requirements to host a stateless web app with administrator OS access and redundancy in case of Azure region failure?

1. Yes

2. No

3. Partially

4. Depends on configuration

The correct answer is: No

Deploying a virtual machine scale set that uses autoscaling does indeed meet the requirements to host a stateless web application with administrator OS access and redundancy in the event of an Azure region failure. The key aspect here is the capability of virtual machine scale sets to automatically manage the scaling of VM instances based on demand. When the application is stateless, it means that the application does not store any client context on the server between requests. This architecture aligns well with the ability of scale sets to scale out (adding more VMs) or scale in (removing VMs) based on incoming traffic, achieving optimal resource utilization and ensuring that the application can handle varying workloads effectively. Redundancy in case of Azure region failure can be achieved through the deployment of scale sets across multiple availability zones within the same region or across multiple regions. This way, if one zone or region experiences an outage, the application can still remain accessible from other zones or regions where the scale set is deployed. The provision of administrator OS access is facilitated by the scale set allowing configurations that enable remote access through protocols such as RDP or SSH, depending on the OS configuration. In essence, the correct answer acknowledges that a virtual machine scale set equipped with autoscaling features successfully meets the