题目内容
（请给出正确答案）
如下图所示，get、copy和put三进程共用两个缓冲区s、t(其大小为每次存放一个记录)。get进程负责不断地把输入数据送人缓冲区s中，copy进程负责从缓冲区s中取出记录然后复制到缓冲区t中，put进程负责从缓冲区t中取出然后打印。试用p、v操作实现这三个进程的同步，写出程序描述。
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更多“如下图所示，get、copy和put三进程共用两个缓冲区s、…”相关的问题
第1题
设某作业占有7个页面，如果在主存中只允许装入4个工作页面，作业运行时，实际访问页面的顺序是
1，2，3，6，4，7，3，2，1，4，7，5，6，5，2，1。
试用FIF0与L，RU页面调度算法，列出各自的页面淘汰顺序和缺页中断次数，以及最后留驻主存4页的顺序。(假设开始的4个页面已装入主存)
第3题
12号磁盘上，存取文件第2000逻辑字节处的信息，要访问第______块磁盘块。
第8题
system in which persons are chosen from a political elite pool. (1) In this reservoir of possible leaders are the individuals with the skills, education, and other qualifications needed to fill elite positions. It is here that competition does exist, that the highest achievers do display their abilities, and that the best qualified do generally succeed. Here, what is more important is entering this reservoir of qualified people.
(2) Many in the masses may have leadership abilities, but unless they can gain entrance into the elite pool, their abilities will go unnoticed. Those of the higher class and status rank enter more easily into this competition since they have been afforded greater opportunities to acquire the needed qualifications.
(3) In addition to formal qualifications, there are less obvious social-psychological factors which tend to narrow the potential elite pool further. (4) "Self-assertion" and "self-elimination" are processes by which those of higher social status assert themselves and those of lower social status eliminate themselves from competition for elite positions. A young man whose family has been active in politics, who has attended Harvard, and who has established a network of connections to the high position in the business or political world. (5) On the other hand, a young man with less prestigious (有名望的) family background, no connections, and only a high school education or even a college degree from a state university would not likely expect a further place for himself at the top. As Prewitt and Stone explain, such an individual "has few models to follow, no contacts to put him into the right channels, and little reason to think of himself as potentially wealthy or powerful." Thus, self-selection aids in filtering out those of lower income and status groups from the pool of potential elites. Most eliminate themselves from the competition early in the fame.
第9题
5，当分配给该作业的物理块数分别为3和4时，试计算在访问过程中所发生的缺页次数和缺页率。
第10题
组成部分的存款保险制度，将在今年全新登场。事实上，早在1993年《国务院关于金融体制改革的决定》中就已经提出要建立存款保险基金，并在97年真正启动存款保险制度的研究。而作为一国存款保险制度基石的立法工作也于2003年启动，并已形成《存款保险条例》的初稿。07年金融工作会议又明确提出要加快建立存款保险制度，表明存款保险制度的各项准备工作加速推进。存款保险制度有何影响?我国建立存款保险制度的必要性表现在哪些方面?
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