In OS assisted virtualization, how is the guest OS configured?

In OS-assisted virtualization, the guest operating system is designed to interact with the host system for resource management, which is why the best choice is that it communicates with the host to request resources. This interaction is necessary because the host operating system provides an abstraction layer that allows the guest OS to function properly within the virtual environment.

Unlike full virtualization, where the guest OS might not be aware of the host and operates in complete isolation, OS-assisted virtualization enables much closer integration. For instance, the guest OS can use specific calls or interfaces provided by the host to access hardware resources like memory, CPU, and I/O devices. This method enhances efficiency since the guest can directly communicate with the host, allowing for better resource allocation, management, and performance.

While the guest OS does have some level of awareness about its virtualized environment, it primarily relies on the host for the allocation of resources and managing those resources effectively. This cooperative relationship between the host and guest systems is fundamental to the efficiency of OS-assisted virtualization technology.