There are two types of files 1) Sequential file 2) Random accesses file.
1. Sequential FileIn this type datas are kept sequentially. If we want to read the last record of the
file we need to read all the records before that record. It takes more time. Or if we desire to access the
10th record then the first 9 records should be read sequentially for reaching to the 10th record.
2. Random Access FileIn this type data can be read and modified randomly. In this type if we
want to read the last records of the file, we can read it directly. It takes less time as compared to
sequential file.
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