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Sequential Access
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The simplest access method is Sequential Access. Information in the file is processed
in order, one record after the other. This mode of access is by far the most common;
for example, editors and compilers usually access files in this fashion.
The bulk of the operations on a file is reads and writes. A read operation reads
the next portion of the file and automatically advances a file pointer, which tracks
the I/O location. Similiarly, a write appends to the end of the file and advances
to the end of the newly written material (the new end of file).
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