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Q11. - (Topic 3)
Which of the following commands will reduce all consecutive spaces down to a single space?
A. tr 's' ' ' < a.txt > b.txt
B. tr -c ' ' < a.txt > b.txt
C. tr -d ' ' < a.txt > b.txt
D. tr -r ' ' 'n' < a.txt > b.txt
E. tr -s ' ' < a.txt > b.txt
Answer: E
Q12. - (Topic 2)
After modifying GNU GRUB's configuration file, which command must be run for the changes to take effect?
A. kill -HUP $(pidof grub)
B. grub-install
C. grub
D. No action is required
Answer: D
Q13. - (Topic 2)
Which of the following environment variables overrides or extends the list of directories holding shared libraries?
A. LD_LOAD_PATH
B. LD_LIB_PATH
C. LD_LIBRARY_PATH
D. LD_SHARE_PATH
E. LD_RUN_PATH
Answer: C
Q14. - (Topic 4)
In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct answers.)
A. cat /proc/self/mounts
B. free
C. mount
D. lsmounts
E. cat /proc/filesystems
Answer: A,C
Q15. - (Topic 1)
Which of the following are init systems used within Linux systems? (Choose THREE correct answers.)
A. startd
B. systemd
C. Upstart
D. SysInit
E. SysV init
Answer: B,C,E
Q16. - (Topic 4)
Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?
A. chmod u=rwx,go=rx /bin/foo
B. chmod o+rwx,a+rx /bin/foo
C. chmod 577 /bin/foo
D. chmod 775 /bin/foo
Answer: A
Q17. - (Topic 3)
Which of the following commands displays the contents of a gzip compressed tar archive?
A. gzip archive.tgz | tar xvf -
B. tar ztf archive.tgz
C. gzip -d archive.tgz | tar tvf -
D. tar cf archive.tgz
Answer: B
Q18. - (Topic 3)
Which shell command is used to continue background execution of a suspended command?
A. &
B. bg
C. cont
D. exec
E. :&
Answer: B
Q19. - (Topic 4)
Which of the following is the device file name for the second partition on the only SCSI drive?
A. /dev/hda1
B. /dev/sda2
C. /dev/sd0a2
D. /dev/sd1p2
Answer: B
Q20. - (Topic 3)
Which of the following commands is used to change options and positional parameters for a running Bash?
A. history
B. set
C. bashconf
D. setsh
E. envsetup
Answer: B
