Which of the following commands erases the contents of the /dev/sdb3 partition?
rm /dev/sdb3
dd if=/dev/zero of=/dev/sdb3
dd of=/dev/zero if=/dev/sdb3
umount /dev/sdb3
Correct answer: B
Question 2
Which of the following files will be looked for and used by GNU make, if one of them exists, unless a different file is specified on the command line when trying to compile software from source code? (Choose two.)
configure
config.h.in
makefile
Makefile
Makefile.in
Correct answer: CD
Question 3
What command is used to send messages to all users currently logged in? (Specify ONLY the command without any path or parameters.)