A Hyper-V server runs five virtual machines (VMs). Each running VM is assigned 1GB of RAM. How much memory would you recommend for the server?

• A. 4 GB
• B. 5 GB
• C. 6 GB
• D. 8 GB

Answer: (C)

When determining the amount of memory needed for a Hyper-V server that runs multiple virtual machines, it’s important to consider not just the memory assigned to each VM but also the memory required by the Hyper-V host itself.

In this scenario, there are five virtual machines, each assigned 1GB of RAM. This amounts to a total of 5GB just for the VMs (5 VMs x 1GB each). The host operating system and the Hyper-V role also require memory to operate efficiently. Therefore, beyond the 5GB for the VMs, additional memory is necessary for the Hyper-V server to manage resources, run background services, and handle overhead.

Recommending a total of 6GB would provide a minimal buffer for the host operations after allocating the 5GB for the VMs. However, having a total of 8GB allows for a better performance margin, enabling smoother operation and ensuring that there’s enough RAM to accommodate any potential spikes in resource demand or additional background processes.

Thus, the recommendation of 8GB as optimal for the server accommodates both the memory needs for the VMs and the essential operational requirements of the Hyper-V system.