What is the incorrect description about CPU and memory QoS resources?

The assertion regarding memory QoS requiring the memory reuse switch to be enabled is not accurate. Memory QoS (Quality of Service) focuses on the management and allocation of memory resources among different virtual machines to ensure that critical workloads always have access to the memory they require. The capability to manage memory does not inherently depend on a specific switch being activated; rather, it functions based on the configuration and policies established by the user's settings and infrastructure.

In contrast, the other options correctly describe aspects of CPU and memory QoS. For instance, memory QoS aims to allocate sufficient memory resources to essential virtual machines without interference from less critical workloads, ensuring performance stability. CPU shares are designed to allocate processing power based on the competition among workloads, which can include various VMs and applications sharing the same physical CPU resources. Furthermore, CPU QoS is essential in allocating compute resources effectively, so that all virtual machines can perform their roles without being starved of necessary processing capabilities, granting a degree of predictability in the way CPU resources are delivered.

Overall, the description that implies a requirement for a memory reuse switch does not align with the operational mechanisms of memory QoS, thus making it the incorrect statement.