41. Which of the following commands is used to display the filenames in multiple columns?

A. ls
B. ls -1
C. ls -x
D. lc
E. None of the above

42. Which command is used with file named ‘note’ to remove the executable permission from the user and assign read permission to the group and others?

A. chmod u-x, go+r note
B. chmod go+r, u+x note
C. chmod g-x, uo+r note
D. chmod go+x, u-x note
E. None of the above