26. Which command will be used with vi editor to insert text to left of cursor?

A. s
B. S
C. a
D. i
E. None of the above

27. In vi editor, forward search is performed using the command.

A. :pat
B. ?pat
C. /pat
D. All of the above
E. None of the above

28. Which of the following special shell variables is used to process number of the last background job?

A. $!
B. $#
C. $0
D. $*
E. None of the above

29. Which option will be used with ps command to slow the entire command line of the process being run?

A. -4
B. -f
C. -1
D. -2
E. None of the above

30. Which of the following command addresses all users who are currently hooked on?

A. write
B. mail
C. wall
D. mesg
E. None of the above