Questões de Concurso Comentadas por alunos sobre virtualização em sistemas operacionais

Some Intel processors provide hardware-assisted virtualization to improve the fundamental flexibility and robustness of traditional software-based virtualization solutions by accelerating key functions of the virtualized platform.

About hardware-assisted virtualization, consider the following statements.

I. It enables the VMM to share I/O devices with several guest OSs at the same time.

II. It speeds up the transfer of platform control between the guest operating systems (OSs) and the virtual machine manager (VMM)/hypervisor.

III. It optimizes the network for virtualization with adapter-based acceleration.

IV. It is used in data centers for disaster recovery, high availability and business continuity, and in desktops to increase flexibility, improve security, and reduce costs.

Choose the correct alternative.

The concept of time sharing was developed to improve resource utilization by allowing multiple users to access a single computer system simultaneously, with each user being given the illusion of having access to a full set of system resources. System virtual machines take this concept one step further by providing a similar illusion for complete systems.

Regarding virtual machines, assign T (true) or F (false) to the following statements

(  ) A system VM environment is capable of supporting multiple system images simultaneously, each running its own operating system.

(  ) Each operating system controls and manages a set of virtualized hardware resources.

(  ) Each virtual resource may or may not have a corresponding physical resource.

(  ) Real resources of the host platform are shared among the guest system VMs, with a layer of hardware.

(  ) Both virtual machines and native systems have the same capabilities.

Choose the alternative that shows, top-down, the correct sequence.