[备战07英语四级听力小词经典29例]1,a change of pace 节奏变换You can‘t do these chemistry experiments all day long. You certainly need a change of pace.2, a far cry from 相距甚远The published...+阅读
文件管理
问题一:
⑴ 文件、文件系统的概念?
⑵ 文件从不同角度(性质和用途、信息的保存期限、保护方式、逻辑结构、物理结构、存取方式、内容,特别是逻辑结构和物理结构),可以分哪几类?
⑶ 文件系统的功能和优点?
问题二:
⑴ 文件的存取方式有哪两种?
⑵ 文件的存储设备有哪些?
⑶ 具体阐述常用的几种文件物理结构及其优缺点。
⑷ 文件存储设备、文件物理结构与存取方式的关系。
问题三:
⑴ 什么是文件目录、目录文件与当前目录?
⑵ 文件目录结构有哪几种,各有什么优缺点?
⑶ 为了提高检索速度,对文件目录应做怎样的改进?
问题四:
⑴ 用哪几种方法实现文件存储的管理?
位示图法、空间块表、空闲块链表
⑵ 通过哪几种方面实现文件的存取控制(共享、保护和保密)?要求具体阐述。
问题五:
⑴ 如何使用文件(建立、打开、读、写、关闭、撤消)?
⑵ 文件系统的安全(海量转储、增量转储)?
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