题目内容

(66) method is the use of a data processing system to represent selected behavioral (67) of a physical or abstract system. For example, the representation of air streams around airfoils at various velocities, temperatures, and air pressures with such a system.Emulation method is slightly different, it uses a data processing system to imitate another data processing system, so that the imitating system accepts the same data, executes the same programs, and achieves the same (68) as the imitated system. Emulation is usually achieved (69) hardware or firmware. In a network, for example, microcomputers might emulate terminals (70) communicate with mainframe. (67)处填()。

A. qualification
B. characteristics
C. specialities
D. properties

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Questions 12 to 15 are based on the conservation you have just heard.

A. He does not know how to open the computer.
B. He does not know how to send an E-mail.
C. He does not know how to write an E-mail.
D. He does not know how to change a word.

某个单CPU计算机的操作系统有n个进程,当它处于非核心程序运行时,在运行队列、就绪队列和等待队列中的进程数目分别为()。

A. 0~1个、0~n-1个和0~n个
B. 1个、0~n-1个和0~n-1个
C. 1个、0~n个和0~n个
D. 1个、1~n-1个和0~n-1个

()展现了一组对象、接口、协作和它们之间的关系。

A. 类图
B. 对象图
C. 协作图
D. 活动图

传统的交换机作为第二层设备,只能识别并转发 (59) 地址,要支持 VLAN间的通信只能借助于具有 (60) 功能的网络设备。 (60)处填()。

A. 三层交换
B. 通信交换
C. 信元交换
D. 线路交换

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