Computer File Systems

In Indexed sequential access, an index is created for each file to search sequentially the records and the pointer is used to access the file directly.

This operation on file is the one in which file attributes remain the same, but the file has a reduced size because a user deletes information in the file.

This attribute of a file contains control information for user access.

This directory structure in the file system is the one in which all files reside in one and the same directory.

These type of files have information about the list of files in operating system

Online inquiry requires random access storage that can quickly retrieve any record without sequential searching. When users need instant answers about payable accounts, direct access storage is essential. Batch processing can use sequential storage, but online inquiry demands immediate access to specific records.

Following are the accesses provided by RandomAccessFile classr: r, rw, rws, rwd

An input/output stream that wraps a file stream buffer, provides functions to open or close a file in addition to those of generic input/output stream

These three file pointers are automatically defined when a program executes and provide access to the keyboard and screen.

Appending in file operations means adding new data to the end of an existing file without modifying the existing content. This is commonly used in logging systems, data collection applications, and sequential file processing where records need to be added over time. The append position always follows the last byte of existing data.

This directory is the place where users can store their own files and create subdirectories.

This utility in UNIX is a facility for creating and reading archives.

This file or directory permission allows an user to look at the contents of the file.