A directory is a special file that the kernel maintains. Brief about the directory representation in UNIX?Ī Unix directory is a file containing a correspondence between filenames and inodes. If the file is large, inode has indirect pointer to a block of pointers to additional data blocks (this further aggregates for larger files). In addition to descriptions about the file, the inode contains pointers to the data blocks of the file. Directories are also represented as files and have an associated inode. The inode contains info about the file-size, its location, time of last access, time of last modification, permission and so on. A ‘character special file’ represents a device with characteristics similar to a keyboard (data transfer is by stream of bits in sequential order).Īll UNIX files have its description stored in a structure called ‘inode’. A ‘block special file’ represents a device with characteristics similar to a disk (data transfer in terms of blocks). A ‘regular file’ is just an ordinary data file in the disk.

Thus, device files and other files are named and accessed in the same way. How are devices represented in UNIX?Īll devices are represented by files called special files that are located in/dev directory. As per my experience good interviewers hardly plan to ask any particular questions during your Job interview and these model questions are asked in the online technical test and interview of many IT companies. These Unix Questions are very important for campus placement test and job interviews. Best Unix Interview Questions and Answersĭear Readers, Welcome to Unix Interview Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Unix.

Icopy size mismatch