[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fhz4MxBGSpeRXVtoYY9yzlpxc-Jmhq8VqqSUyOs3xnME":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":22,"type":23},[],"2023-06-01 16:37:39",40656664,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},13,"feba23fa023b322aecf38250142b26f9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd4872438e1406e2280dc29830cd96f75.jpg","操作系统-21计科软件网络物联网","exam_95668495","填空题测验","有 n 个进程竞争必须互斥使用的共享资源,当用 PV 操作管理时,信号量的变化范围是:-( )~( ).注意:第一个空外边有负号,只填括号里面的部分即可",[17,24,29,32,37,42,47,52,57,62],{"answer":18,"createTime":5,"id":19,"options":20,"question":21,"source":22,"type":23},[],40656662,[],"作业从进入系统到最后完成,可能要经历三级调度,分别是 . ( )调度:作业调度或长程调度 ( )调度:内存外存对换(为了提高内存利用率和系统吞吐量) ( )调度:进程调度 答案要求:三空均为两个字","v1",2,{"answer":25,"createTime":5,"id":26,"options":27,"question":28,"source":22,"type":23},[],40656663,[],"重定位的方式有( )重定位和( )重定位两种,前者在程序装入内存时进行,后者在程序执行时进行.答案要求:每空都是两个字",{"answer":30,"createTime":5,"id":6,"options":31,"question":15,"source":22,"type":23},[],[],{"answer":33,"createTime":5,"id":34,"options":35,"question":36,"source":22,"type":23},[],40656665,[],"Unix系统是按设备与内存之间信息交换的物理单位来对设备进行分类,Unix把设备分成两类:( )设备和( )设备.答案要求:键盘属于前者,磁盘属于后者,注意填写顺序",{"answer":38,"createTime":5,"id":39,"options":40,"question":41,"source":22,"type":23},[],40656666,[],"在分页系统中为实现地址变换而设置了页表寄存器,其中存放了处于( )状态进程的页表长度和页表始址,而其他进程的上述信息则被保存在( )中.答案要求:前空2个字,后空为英文关键词",{"answer":43,"createTime":5,"id":44,"options":45,"question":46,"source":22,"type":23},[],40656667,[],"临界资源的概念是一次仅允许一个( )访问的资源,而临界区是指进程中访问临界资源的那段( )区域.答案要求:两空均为两个字",{"answer":48,"createTime":5,"id":49,"options":50,"question":51,"source":22,"type":23},[],40656668,[],"某程序逐块处理从磁盘读入的数据,考虑到 CPU 的处理速度大大高于磁盘传输的速度,执行该程序时 CPU 的利用率极低. 操作系统常常采用 ( )技术,以缓解这种情况",{"answer":53,"createTime":5,"id":54,"options":55,"question":56,"source":22,"type":23},[],40656669,[],"按用户对文件的存取权限将用户分为若干组,同时规定每一组用户对文件的访问权限.这样,所有用户组存取权限的集合称为该文件的____",{"answer":58,"createTime":5,"id":59,"options":60,"question":61,"source":22,"type":23},[],40656670,[],"在避免死锁的方法中,允许进程动态地申请资源,但系统在进行分配时应先计算资源分配的( )性.若此次分配不会导致系统进入( )状态,便将资源分配给它,否则进程( ).答案要求:第1和3空两个字,第2空3个字",{"answer":63,"createTime":5,"id":64,"options":65,"question":66,"source":22,"type":23},[],40656671,[],"每个索引文件至少有一个索引表,索引表中每个表项应当包括能够标识该记录的( )和该逻辑记录的起始( ).答案要求:第一空为3个字,第2空为两个字"]