11. Which of the following commands is used to display the directory attributes rather than its contents?

A. ls -l -d
B. ls -l
C. ls -x
D. ls -F
E. None of the above

12. Which of the following files will displayed by this command cat *ch*

A. patch
B. catch
C. .ch
D. All of the above
E. None of the above

13. The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is:

A. 000
B. 755
C. 744
D. 555
E. None of the above

14. If you are to use [Control-c] as the interrupt key instead of [Del], then you will have to use

A. tty ^c
B. stty intr \^c
C. stty echoe
D. stty echo \^a
E. None of the above

15. Which of the following is not a communication command.

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