Microsoft Azure Architect Technologies (AZ-300) Practice Exam 2026 - Free AZ-300 Exam Questions and Study Guide

A VM scale set in Azure is designed to provide high availability to your applications and allows you to centrally manage, configure, and update a large number of virtual machines. The core functionality of a VM scale set is its ability to automatically adjust the number of virtual machines based on demand through autoscaling. This means that as the workload increases and decreases, the scale set can dynamically add or remove instances of virtual machines to ensure optimal performance and cost management.

In contrast, the first option refers to a static group of VMs which does not incorporate the dynamic capabilities of scaling, as it emphasizes fixed resources rather than adaptable infrastructure. The third option implies a dedicated server that is more aligned with traditional hosting setups, which do not capture the elasticity offered by scale sets. The fourth option discusses data storage rather than the management of virtual machines, making it irrelevant to the concept of scale sets.