Question

Explain the basic file operations that can be performed on a file. explain indexed
sequential file organisation.

Answer 1

To define a file properly, we need to consider the operations that can be performed on files. Six basic file operations. The OS can provide system calls to create, write, read, reposition, delete, and truncate files. An entry for the new file must be made in the directory.

(ISAM)

ISAM)ISAM method is an advanced sequential file organization. In this method, records are stored in the file using the primary key. An index value is generated for each primary key and mapped with the record. This index contains the address of the record in the file.

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