假设铁路自动售票系统有n个售票终端，该系统为每个售票终端创建一个进程Pi（i=1,2,…,n）管理车票销售过程。假设Tj（j=1,2,…,m）单元存放某日某趟车的车票剩余票数，Temp为Pi进程的临时工作单元，x为某用户的购票张数。Pi进程的工作流程如下图所示，用P操作和Ⅴ操作实现进程间的同步与互斥。初始化时系统应将信号量S赋值为（ ）。图中（a）、（b）和（c）处应分别填入（ ）。
问题1选项
A.n-1
B.0
C.1
D.2
问题2选项
A.V(S)、P(S)和P(S)
B.P(S)、P(S)和V(S)
C.V(S)、V(S)和P(S)
D.P(S)、V(S)和V(S)
正确答案及解析
正确答案
解析
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