a2zinterviews

6.	Define directory and filename?
	A directory is a file that contains directory entries. The directory entry containing a file name along with structure of information describing the attributes of the file. The names in a directory are called filename. The only two characters that cannot appear in a file name are / and null character.

7.	Define program and process?
	A program is a executable file residing in a disk file. An executing instance of a program is called a process. Every UNIX process have a unique numeric identifier called the process ID. The process ID is always a non negative integer.

8.	List down the different file types?
	Regular file Directory file Character special file Block special file FIFO Symbolic link Socket

9.	What are the options available to determine the group ID of the new file?
	The group ID of the new file can be the effective group ID of the process The group ID of the new file can be the group ID of the directory in which the file is being created.

10.	Define sticky bit?
	The bit S_ISVTX is known as sticky bit. If this bit is set for an executable program file, then the first time the program was executed a copy of the programmer’s text was saved in the swap area when the process terminated. The advantage of using this is the program is loaded into memory faster the next time.