In which of the following scenarios, the core instructions issued by the operating system can be directly sent to the underlying hardware?

Question

Options

• ACPU full virtualization scenario
• BCPU Paravirtualization Scenario
• CHardware Assisted Virtualization Scenarios
• DNon-virtualized scenarios

• A
  3% (2)
• B
  6% (4)
• C
  10% (7)
• D
  81% (57)

Explanation

In a non-virtualized (bare-metal) scenario, the OS runs directly on the physical hardware with no abstraction layer between them, so its core instructions travel directly to the CPU and other hardware components without any translation or interception.

Why the distractors are wrong:

• A (Full Virtualization): The guest OS runs unmodified but its privileged instructions are trapped and emulated by the hypervisor - instructions never reach hardware directly.
• B (Paravirtualization): The guest OS is modified to use hypercalls to communicate with the hypervisor, which then mediates hardware access - still not direct.
• C (Hardware-Assisted Virtualization): CPU extensions (Intel VT-x, AMD-V) help the hypervisor manage guest instructions more efficiently, but a hypervisor still sits between the guest OS and hardware - "assisted" doesn't mean "direct."

Memory tip: Think of it as a chain of command. In options A, B, and C, there's always a middleman (the hypervisor) intercepting OS instructions before hardware sees them. Only in option D - no virtualization, no middleman - does the OS talk directly to hardware. If you see "virtual" anywhere in the option, direct hardware access is off the table.

No community discussion yet for this question.