操作系统中的Spooling技术，实质是将______转化为共享设备的技术。
- A.虚拟设备
- B.独占设备
- C.脱机设备
- D.块设备
正确答案及解析
正确答案
解析
本题考查嵌入式操作系统的基础知识。Spooling的意思是外部设备同时联机操作，又称为假脱机输入/输出操作，是操作系统中采用的一项将独占设备改造成共享设备的技术。Spooling系统的组成包括三部分：输入井和输出井、输入缓冲区和输出缓冲区、输入进程和输出进程。为了解决CPU输出数据的速度远远高于打印机的打印速度这一矛盾，在操作系统中一般采用Spooling技术。
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