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Q1: Which option signifies the default runlevel specified in /etc/inittab?
default
optionboot
initdefault
initlevel
Q2: What is the default runlevel for the single-user mode?
Runlevel 6
Runlevel 3
Runlevel 1
Runlevel 2
Q3: Which command brings the system down immediately?
halt
shutdown -P 0
/etc/init.d stop
halt-system
Q4: How do you identify the run level at which the system is operating?
show-init
runlevel
init-lvl
runlevel-list
Q5: Udev rules files are located in which directory?
/etc/udev.cfg
/etc/udev/rules.d
/etc/udev.cfg.d
/etc/udev.config
Q6: Which file would you edit to change the message that is displayed after login?
/etc/issue
/etc/skel/profile
~/.bashrc
/etc/motd
Q7: Which shutdown command can be used to restart a running Linux system in 10 minutes?
shutdown +10
shutdown -r +10
shutdown -R -10
shutdown -r 6000
Q8: Which of the following commands will safely remove an external drive(/dev/sda1) from the system?
unmount /dev/sda1
usbeject /dev/sda1
safe-eject /dev/sda1
umount /dev/sda1
Q9: Which utility is used to add loadable modules to the Linux kernel?
lsmod
insmod
modprobe
addmod
Q10: Which command is used to display the list of currently loaded kernel modules?
modprobe
moddisplay
ls -modules -all
lsmod
Q11:Which command will send a message to all terminal users currently logged on the system?
msg
tty
ssh
wall
Q12: Which of the following commands will change system runlevel to single user mode?
teleinit 1
tty 1
telinit 1
inet 1
Q13: Which key is used to edit the boot parameters from the GRUB menu?
b
o
e
i
Q14: Which command will build the initial RAM disk on a RHEL 6 distribution?
buildraminit
mk.init
dracut
mkfs.init
Q15: Which of the following commands will check and fix the disk for errors and bad sectors?
fstrim
fdisk
fsck
fs.chk
Q16: In which location NVMe drives should show up?
/dev/sda*
/dev/ssd/nvme*
/dev/sdx*
/dev/nvme*
Q17: Which of the following directories stores information about logical volumes?
/dev/mapper
/dev/lvminfo
/dev/lvmmap
/dev/lvmap
Q18: Which directory contains scripts used by the System V init tools?
/etc/inittab
/etc/init.d
/etc/init
/etc/sysv
Q19: Which of the following files defines the runlevels on a Linux system?
/etc/initlevels
/etc/rc.d
/etc/inittab
/etc/runlevel
Q20: Which of the following files contains a message to be printed to SSH users before the login prompt?
/etc/mottd
/etc/issue
/etc/login.txt
/etc/banner
Q21: Which option will suppress the banner when using the wall command to send a message to users?
-s
-e
-n
-d
Q22: Which of the following commands will start a service at boot?
reboot start my_service.service
load my_service.service
systemctl enable my_service.service
start my_service.service
Q23: Which command would you use to refresh the system after changes have been made to /etc/inittab without rebooting the system?
source /etc/init.d
telinit
init 1
refresh-inittab
Q24: Which command is used to list connected usb devices?
listusb
lsusb
ls -usb
cat /dev/usb/*
Q25: Which systemd runlevel (target) coresponds to the single-user mode under System V?
multi-user.target
rescue.target
single-user.target
graphical.target
Q26: Which directory contains information about USB devices?
/etc/usb.d
/dev/usb
/usr/bin/lsusb
/sys/bus/usb/devices
Q27: Which command is used to examine the kernel ring buffer and troubleshoot the boot process?
cat /var/log/boot
dmesg
cat /root/bootlog
kbuffer
Q28: Which command will dump the physical USB device hierarchy as a tree?
lsusb --tree
lsusb -t
lsusb -tree
lsusb -dump
Q29: Which command is used on a System V system for starting and stopping services?
systemctl
start.service
service
init
Q30: Which is the dafault signal number used by the kill command to end a process?
1
2
9
15