某计算机系统中有一个CPU、一台扫描仪和一台打印机。现有3个图像任务,每个任务有3个程序段:扫描S i ,图像处理C i 和打印P i (i=1,2,3)。如图1-15所示为3个任务各程序段并发执行的前驱图,其中,(1)可并行执行,(2)的直接制约,(3)的间接制约。 https://assets.asklib.com/psource/2016091416561165968.gif 空白(1)处应选择()

A . A."C S ","P C S ","P C " B . "C S ","S C P ","C P " C . "S C P ","S C P ","S C P " D . "S S S ","C C C ","P P P "

时间:2022-10-18 23:00:11 所属题库:操作系统题库

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