[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fWZrYgV9pLNsdZ40M647BnySuChsk7pJ6H_1jSzdJZJw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-05 14:49:53",47172882,[8,9,10,11],"输出缓冲区已空","输出缓冲区已有数据","输出设备已开始工作","输出设备已收到I\u002FO指令",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},15,"e75dc17fd776fa6d4b5dfbe32b2b87c4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7d0b54cd24fb877a3423e86cd43a764a.png","2023操作系统","work_27340927","第7次作业","在程序I\u002FO方式中,对于输出设备,准备就绪是指( )",[21,32,41,50,53,60,66,71,76,81],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],47172879,[25,26,27,28],"主存","外存","ROM","寄存器","缓冲技术中的缓冲池在( )中","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],47172880,[36,37,38,39],"程序查询","中断方式","DMA方式","无条件存取方式","如果I\u002FO设备与存储设备进行数据交换不经过CPU来完成,这种数据交换方式是( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],47172881,[45,46,47,48],"虚拟设备","独占设备","脱机设备","块设备","操作系统中的SPOOLING技术,实质是将( )转换为共享设备的技术",{"answer":51,"createTime":5,"id":6,"options":52,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":54,"createTime":5,"id":55,"options":56,"question":59,"source":30,"type":31},[],47172883,[46,57,45,58],"共享设备","一般物理设备","采用假脱机技术,将磁盘的一部分作为公共缓冲区以代替打印机,用户对打印机的操作实际上是对磁盘的存储操作,用以代替打印机的部分是( )",{"answer":61,"createTime":5,"id":62,"options":63,"question":64,"source":30,"type":65},[],47172884,[],"I\u002FO设备的控制方式有( )、( )和( )等",2,{"answer":67,"createTime":5,"id":68,"options":69,"question":70,"source":30,"type":65},[],47172885,[],"设备控制器是①和②之间的接口,它接受来自③的I\u002FO命令,并用于控制_④的工作",{"answer":72,"createTime":5,"id":73,"options":74,"question":75,"source":30,"type":65},[],47172886,[],"SPOOLing系统是由磁盘中的①和_②,内存中的③和_④,⑤和_⑥以及井管理程序构成的",{"answer":77,"createTime":5,"id":78,"options":79,"question":80,"source":30,"type":65},[],47172887,[],"磁盘的访问时间由①、②和_③三部分组成,其中所占比重比较大的是④,故磁盘调度的目标为_⑤",{"answer":82,"createTime":5,"id":83,"options":84,"question":85,"source":30,"type":65},[],47172888,[],"在磁盘调度中,选择优先为离当前磁头最近的磁道上的请求服务的算法为①算法,这种算法的缺点是会产生②现象;选择优先为当前磁头移动方向上、离当前磁头最近的磁道上的请求服务的算法为③算法"]