单选题
● As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called (71) .
(71)
题目答案
A
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答案解析
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● As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called (71) .
(71)
●连接打印机不能使用 (1) 。
● 下列 Internet 应用中,传输层需要采用 UDP 协议的是 (67) 。
(67)
●硬盘与软盘相比,硬盘具有 (2) 的特点。
●用来选择被淘汰页面的算法称为页面淘汰算法。在以下算法中, (8) 最理想。
●操作系统对不同的中断进行了分级,现有磁盘、键盘和时钟三种外部中断,按照中断级别的高低的排序为 (12) 。