[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1-6Kra5LIxPYhwv6kDcPxDtVwCklsb0mJmmXyNuBA8w":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":20,"type":21},[],"2025-06-04 19:32:36",194166936,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},50,"06571a852bfa25d389736b1d15083e42","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9703336f5f7db63c95cacf618866ec84.jpg","操作系统(2025)","work_44034150","第9章 磁盘存储器管理 作业","假设某文件系统采用混合索引文件物理结构,各文件的文件控制块(或索引节点)包含10个直接地址项、1个一级间址项、1个二级间址项以及1个三级间址项.若磁盘盘块的大小是2KB,而磁盘盘块地址(即盘块号)占4B,则该文件系统支持的最大文件长度是多少",[17,22,32,41,50,59,68,74,82,87],{"answer":18,"createTime":5,"id":6,"options":19,"question":15,"source":20,"type":21},[],[],"v1",4,{"answer":23,"createTime":5,"id":24,"options":25,"question":30,"source":20,"type":31},[],194166938,[26,27,28,29],"虚拟盘是一种易失性存储器,因此它通常只用于存放临时文件","优化文件物理块的分布可显著地减少寻道时间,因此能有效地提高磁盘I\u002FO的速度","对随机访问的文件,可通过提前读提高对数据的访问速度","延迟写可减少启动磁盘的次数,因此能等效地提高磁盘I\u002FO的速度","从下面的论述中错误的论述是( )",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":20,"type":31},[],194166940,[36,37,38,39],"内存","磁盘控制器","Cache","磁盘","磁盘高速缓存设在( )中",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":20,"type":31},[],194166941,[45,46,47,48],"重排I\u002FO请求次序","在一个磁盘上设置多个分区","预读和滞后写","优化文件物理块的分布","下列选项中,不能改善磁盘设备I\u002FO性能的是( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":20,"type":31},[],194166942,[54,55,56,57],"仅Ⅰ、Ⅱ","仅Ⅱ、Ⅲ","仅Ⅰ、Ⅲ、Ⅳ","Ⅰ、Ⅱ、Ⅲ、Ⅳ","下列优化方法中,可以提高文件访问速度的是( ). Ⅰ.提前读 Ⅱ.为文件分配连续的簇 Ⅲ.延迟写 Ⅳ.采用磁盘高速缓存",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":20,"type":31},[],194166943,[63,64,65,66],"廉价磁盘冗余阵列","磁盘容错技术","磁盘高速缓存","后备系统","下列方式中,( )不能改善磁盘系统的可靠性",{"answer":69,"createTime":5,"id":70,"options":71,"question":72,"source":20,"type":73},[],194166944,[],"使用位示图(30行,50列)表示空闲盘块状态.如当分配一个盘块号为174时,其在位示图中的行数为 ,列数为23.(注:行列始下标为0)",2,{"answer":75,"createTime":5,"id":76,"options":77,"question":80,"source":20,"type":81},[],194166947,[78,79],"正确","错误","在显式链接文件中是在每个盘块中设置一个链接指针,用于将文件的所有盘块都链接起来",3,{"answer":83,"createTime":5,"id":84,"options":85,"question":86,"source":20,"type":81},[],194166950,[78,79],"顺序文件必须采用连续分配方式,而链接文件和索引文件则可采用离散分配方式",{"answer":88,"createTime":89,"id":90,"options":91,"question":92,"source":20,"type":81},[],"2025-06-04 19:32:37",194166953,[78,79],"对一个具有三级索引表的文件,存取一个记录通常需要3次访问磁盘"]