Which system files are updated as devices are mounted and unmount to provide information on the
mounted devices and the options used? (Please specify TWO answers)

A.
/proc/dtab

B.
/etc/mtab

C.
/etc/fstab

D.
/proc/mounts

E.
/proc/devices

Explanation:
The programs mount and umount maintain a list of currently mounted file systems in the file
/etc/mtab. If no arguments are given to mount, this list is printed.
See
http://linux.web.cern.ch/linux/scientific5/docs/rhel/Deployment_Guide/s2-proc-mounts.html
Similar to the contents of /etc/mtab, except that /proc/mount is more up-to-date.