Alibaba Cloud Certified Associate (ACA) 2025 – 400 Free Practice Questions to Pass the Exam

The choice of selecting one switch in one zone can negatively affect the stability of an Alibaba Cloud Scaling Group because it creates a single point of failure. If that switch experiences issues or goes down, all resources connected to it could become unavailable, leading to interruptions in service and reducing the overall robustness of the scaling group.

In contrast, the other options contribute positively to the stability of the scaling group. Utilizing different ECS types can enhance resilience by allowing workloads to run on various architectures, which helps mitigate risks associated with one particular instance type. Associating multiple Server Load Balancers helps distribute incoming traffic across several backend servers, thus minimizing the impact of any single server failure. Lastly, creating a scaling group across multiple zones increases availability and fault tolerance, as resources can remain accessible even if one zone experiences a disruption.