【单选题】【消耗次数:1】
在操作系统中,对信号量S的P操作原语的定义中,使进程进入相应阻塞队列等待的条件是( )。
S>0
S=0
S<0
S不等于0
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相关题目
【单选题】 在操作系统中,对信号量S的P操作原语的定义中,使进程进入相应阻塞队列等待的条件是()。
①  S>0
②  S=0
③  S<0
④  S≠0
【单选题】 在操作系统中,对信号量S的P操作原语的定义中,使进程进入相应阻塞队列等待的条件是( )。
①  S>0
②  S=0
③  S0
【单选题】 如果信号量S的值是0 , 此时进程A执行P(S)操作,那么,进程A会( )。
①  继续运行
②  进入阻塞态,让出CPU
③  进入就绪态,让出CPU
④  继续运行,并唤醒S队列头上的等待进程
【单选题】 如果信号量S的值是0,此时进程A执行P(S)操作,那么,进程A会()。
①  继续运行
②  进入阻塞态,让出CPU
③  进入就绪态,让出CPU
④  继续运行,并唤醒S队列头上的等待进程
【单选题】 如果进程Pa对信号量S执行P操作,则信号量S的值应( )。
①  加1
②  减1
③  等于0
④  小于0
【单选题】 如果进程Pa对信号量S执行P操作,则信号量S的值应( )。
①  加1
②  减1
③  等于0
④  小于0
【单选题】 如果进程Pa对信号量S执行P操作,则信号量S的值应()。
①  加1
②  减1
③  等于0
④  小于0
【单选题】 信号量S的初值为8,在S上执行了10次P操作,6次V操作后,S的值为( )。
①  10
②  8
③  6
④  4
【单选题】 信号量S的初值为8,在S上执行了10次P操作,6次V操作后,S的值为()。
①  10
②  8
③  6
④  4
【单选题】 1. 对下面程序段描述正确的是int x=0,s=0; while (x!=0) s=s+x+1;printf(%d
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②  运行程序段后输出1
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