Which two platforms provide hypervisor virtualization? (Choose two.)

DevStack is a scripted deployment tool for setting up OpenStack in development environments, not a hypervisor.

Docker uses OS-level containerization via namespaces and cgroups rather than hypervisor virtualization; containers share the host OS kernel instead of virtualizing hardware.

KVM (Kernel-based Virtual Machine) is a Type-1 hypervisor integrated into the Linux kernel that provides full hardware virtualization, allowing multiple guest VMs to run on physical hardware via extensions like Intel VT-x or AMD-V.

OpenStack is a cloud infrastructure management and orchestration platform that relies on underlying hypervisors like KVM or Xen but is not itself a hypervisor.

Xen is an open-source Type-1 bare-metal hypervisor that runs directly on hardware and supports both paravirtualization and full hardware virtualization, making it a true hypervisor platform used in production cloud environments such as AWS.