单项选择题

Which of the following is the correct term for a virtual machine？（）

A. Hypervisor
B. Guest OS
C. Virtual Center
D. Host OS

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单项选择题

A server needs to have memory added to support a new application. It currently is using PC4200 in a single channel configuration. Which of the following would be the correct memory upgrade？（）

A.Install larger capacity PC2100 dual channel memory modules.
B.Add a PCI expansion card with PC2100 single channel memory modules.
C.Install smaller capacity PC4200 single channel memory modules.
D.Install larger capacity PC4200 single channel memory modules.

单项选择题

Which of the following archiving methods only backs up data that has changed since the previous full backup?（）

A. Snapshot
B. Incremental
C. Copy
D. Differential

单项选择题

Which of the following software directly interacts with the hardware and handles hardware resource requests from virtual machines？（）

A. Guest OS
B. Virtual Center
C. VT
D. Hypervisor