单选

●操作系统的作业调度的主要功能和流程是 (36) ?
Ⅰ记录已进入系统的各作业的情况，管理系统中所有作业的执行顺序。
Ⅱ每个作业进入系统时由系统为其建立一个作业控制块JCB(JOb Control Block)，它是存放作业控制和管理信息的数据结构。
Ⅲ按一定的调度算法，从后备作业中选择一个或几个作业进入系统内存；
Ⅳ为被选中的作业创建进程，并且为其申请系统资源；
Ⅴ作业结束后作善后处理工作。
(36)

A．Ⅰ和Ⅱ &n
bsp; B．Ⅰ、Ⅱ和Ⅲ
C．Ⅱ、Ⅲ和Ⅴ
D．全部

试题出自试卷《2011年程序员考试考前密卷（四）-上午试题》

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