Which file is used to configure the various mounting options of a filesystem upon boot?

a. / etc/mount

b. / etc/fstab

c. / var/filesystem

d. / boot/config

B. / etc/fstab file.

Explanation:

The / var/filesystem file is a subdirectory of the root directory of a linux operating system, used to store files during the operation of a computer system.

The / boot/config file is a file directory used to store system configuration parameters which can be accessed by the GPU before the installation of the ARM CPU and linux.

The / etc/mount (or / etc/mtab) and / etc/fstab are used to show the list of mounted volumes. The / etc/mtab gives details of already mounted volumes, but the / etc/fstab shows the list of possible volumes to be mounted upon the boot of the system.