In a virtualized environment with multiple VMs and limited host RAM, which technique is used to manage CPU allocation by scheduling processes across VMs?

In a virtualized environment with multiple VMs and limited host RAM, which technique is used to manage CPU allocation by scheduling processes across VMs?

• A. Memory overcommitment
• B. Thin provisioning
• C. Process scheduling
• D. Hyperthreading

Answer: (C)

When many virtual machines share a single host, CPU time must be distributed so every VM can run its processes. The hypervisor acts as the scheduler, handing out time slices of the physical CPUs to each VM’s virtual CPUs. This ongoing process scheduling decides which VM runs at a given moment and for how long, allowing CPU resources to be shared fairly or according to configured priorities. That’s why this option is the best fit for managing CPU allocation across VMs. Memory overcommitment pertains to allocating more RAM than is physically available, relying on techniques like paging or ballooning. Thin provisioning is about storage capacity, not CPU. Hyperthreading is a hardware feature that lets a core handle multiple threads but isn’t the mechanism for scheduling CPU time across VMs.

When many virtual machines share a single host, CPU time must be distributed so every VM can run its processes. The hypervisor acts as the scheduler, handing out time slices of the physical CPUs to each VM’s virtual CPUs. This ongoing process scheduling decides which VM runs at a given moment and for how long, allowing CPU resources to be shared fairly or according to configured priorities. That’s why this option is the best fit for managing CPU allocation across VMs.

Memory overcommitment pertains to allocating more RAM than is physically available, relying on techniques like paging or ballooning. Thin provisioning is about storage capacity, not CPU. Hyperthreading is a hardware feature that lets a core handle multiple threads but isn’t the mechanism for scheduling CPU time across VMs.