题目内容

This operating system is widely used by servers on the web, mainframe computers, and very powerful personal computers.

A. Windows
B. Mac OS X
C. Linux
D. UNIX

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This operating system is designed to run only with Apple computers.

A. Windows
B. Linux
C. Mac OS
D. UNIX

This version of UNIX is an open source operating system that is an alternative to Windows.

A. Mountain Lion
B. Lion
C. Linux
D. Windows

This type of embedded operating system is used by smartphones.

A. Desktop
B. Mobile
C. Network
D. Stand-alone

In a virtualized environment, this operating system runs on the physical machine.

A. Guest
B. Client
C. Host
D. Home