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In compute virtualization, which of the following is the operating system running on a virtual machine (VM)?
Comprehensive and Detailed Explanation (HCIA--Cloud Computing aligned):
The HCIA--Cloud Computing syllabus defines clear terminology for virtualization components.
The Guest OS is the operating system installed and running inside a virtual machine. It operates as if it were running on physical hardware, but all hardware access is abstracted by the hypervisor.
The hypervisor (A) is the virtualization layer that manages physical resources and virtual machines.
The host OS (B) is the operating system running on the physical server (in hosted virtualization models).
The host machine (D) refers to the physical server itself.
Therefore, the correct answer is Guest OS.
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