Linux Systems Question: Download Linux OS Systems PDF

Tell me which command is used to mount file system read only.
a) mount -a
b) mount -v
c) mount -f
d) mount -r

d) mount -r

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Pick the run level to run Linux in multi user mode with networking? a) 0 b) 3 c) 5 d) 6	Runlevel system command is used for? a) getting the present and previous runlevel of the system b) setting the runlevel attribute of the system in the inittab file c) can be used to restart or reboot the system d) all of the above