UGC NET CSE | December 2015 | Part 3 | Question: 40

Question

In Unix operating system, special files are used to

• A. buffer data received in its input from where a process reads
• B. provide a mechanism to map physical device to file names
• C. store list of file names plus pointers associated with i-nodes
• D. store information entered by a user application program or utility program

Answer 1

Answer B

• provides a mechanism to map physical device to file names
• Windows and DOS also have special files.
• provide simple interfaces between drivers and  peripheral devices such as printers and serial ports

Please refer: https://en.wikipedia.org/wiki/Device_file