记录文件有顺序文件、索引顺序文件、索引文件和直接文件。（ ）记录定长，记录中的数据项的类型长度与次序固定。
- A.直接文件
- B.索引顺序文件
- C.顺序文件
- D.索引文件
正确答案及解析
正确答案
解析
大多数文件是顺序文件。顺序文件的记录定长，记录中的数据项的类型长度与次序固定。直接文件又称哈希（Hash）wen件。记录以它们在直接访问存储设备上的物理地址直接（随机地）访问。直接文件常用于需要高速访问文件而且每次仅访问一条记录的应用中。
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