Test #1 Multiple Choice

                      Important Instructions

     1. Read all the instructions and both sides (back and front) of all pages.
     2. Manage your time when answering questions on this test.
        Answer the questions you know, first.

_________________________________________________________________

            Multiple Choice - 58 Questions - 10 of 15%

(Office use only: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58)

1.  If /home/idallen is a directory name, which of the following
    pathnames always leads to the same directory?
   *a. /home/./../home/idallen
    b. /home/../home/../idallen
    c. ./home/idallen
    d. ../home/idallen
    e. /home/./home/../idallen

2.  If my current working directory is /usr, and my home
    directory is /home/me, which of the of the following commands
    copies the Unix password file into my home directory under
    the name foo?
   *a. cp ../etc/passwd ../home/me/foo
    b. cp ../usr/../etc/passwd ./home/me/foo
    c. cp ../usr/./etc/passwd ./home/me/foo
    d. cp ../usr/passwd ../home/foo
    e. cp ../usr/passwd ./me/foo

3.  If my current directory is /usr, which of these pathnames is
    equivalent to the file name /bin/ls?
   *a. ../bin/ls
    b. ../bin/ls/.
    c. /bin/../ls
    d. ././bin/ls
    e. /root/bin/ls

4.  If file nine contains nine lines, each of which is the one-
    digit line number of the line in the file (1 through 9), what
    is the output on your screen of this command:
       sort -r nine nine | tail -5 | head -1
   *a. 3
    b. 7
    c. 5 5
    d. 7 7
    e. 1 1

5.  If file foo contains nine lines, each of which is the one-
    digit line number of the line in the file (1 through 9), what
    is the output on your screen of this command:
       cat foo foo foo | sort -r | head -4 | tail -1
   *a. 8
    b. 7
    c. 6
    d. 5
    e. 9

6.  Which Unix command sequence deletes a directory and
    everything inside it?
   *a. rm -r dir
    b. mv -r dir
    c. erase -r dir
    d. rmdir -r dir
    e. delete -r dir

7.  How can you ask the bash (Linux) shell to complete commands
    or file names for you?
   *a. You can type the first part of the command or file name
       and press the TAB key.
    b. You can type the first part of the command or file name
       and press the ALT key.
    c. Type [CONTROL]-[ALT]-[DEL] and the shell will present a
       menu of commands.
    d. Type [CONTROL]-[D] and the shell will present a menu of
       commands.
    e. Type [ALT]-[F2] the shell will present a menu of commands.

8.  If you type the command:   wc
    which of the following key sequences will send an EOF,
    generate output, then take you back to the command prompt?
   *a. [CTRL-D]
    b. [CTRL-C]
    c. [CTRL-L]
    d. [CTRL-U]
    e. [CTRL-R]

9.  If you type the command:   sort
    which of the following key sequences will interrupt it (no
    output) and take you immediately back to the command prompt?
   *a. [CTRL-C]
    b. [CTRL-D]
    c. [CTRL-L]
    d. [CTRL-U]
    e. [CTRL-R]

10. Which of the command lines below will generate a non-empty
    file?
   *a. ls -l file >file
    b. sort -r file file >file
    c. grep pattern file >file
    d. touch file >file
    e. head -1 file >file

11. Which command line below does not show any lines from inside
    the file bat?
   *a. ls bat
    b. head bat
    c. tail bat
    d. cat bat
    e. sort bat

12. How many arguments does the shell pass to this echo command:
       echo " one '2 three' "4 five 6 ' 7 "8 ' >out
   *a. Four arguments.
    b. Five arguments.
    c. Six arguments.
    d. Two arguments.
    e. Three arguments.

13. How many command arguments does the shell pass to this echo
    command:  echo 'It's "lots" isn't it? I won't be guessing.
   *a. Five arguments.
    b. Four arguments.
    c. Three arguments.
    d. Two arguments.
    e. Six arguments.

14. How many command arguments does the shell pass to this echo
    command:  echo <one two three >four five
   *a. Three arguments.
    b. Four arguments.
    c. Five arguments.
    d. Six arguments.
    e. Two arguments.

15. Which of the following is true, given this long directory
    listing from ls:
       drwxr-x--x 512 ian user 123 May 30 12:35 dir
   *a. The number 123 is the size in bytes of this directory.
    b. The number 123 is the count of links (names) this
       directory has.
    c. The number 512 is the inode number of this directory.
    d. The number 512 is the octal permissions of this directory.
    e. The number 512 is the size of this directory.

16. What is the output on your screen of this bash shell command
    line in an empty directory?   echo *
   *a. *
    b. an error message from echo saying * does not exist
    c. no output on screen
    d. .   ..
    e. .

17. What is the output on your screen of this bash shell command
    line in an empty directory?   ls *
   *a. an error message from ls saying * does not exist
    b. no output on screen
    c. *
    d. .   ..
    e. .

18. What appears on your screen after this bash shell command
    line?  echo 123 | wc -c
   *a. 4
    b. 3
    c. 2
    d. 1
    e. no output on screen

19. What appears on your screen after this bash shell command
    line?  echo hi >a ; mv a b | wc -c
   *a. 0
    b. 1
    c. 2
    d. 3
    e. no output on screen

20. What appears on your screen after this bash shell command
    line?  echo hi >out | sort -r
   *a. no output on screen
    b. hi
    c. out
    d. ih
    e. tou

21. What appears on your screen after this bash shell command
    line?  echo date >ls ; cat ls > wc
   *a. no output on screen
    b. 1  1  4
    c. 1  1  5
    d. ls
    e. date

22. Which command line displays the contents of the Unix passwd
    file one page at a time?
   *a. less /etc/passwd
    b. less | /etc/passwd
    c. /etc/passwd >less
    d. /etc/passwd | less
    e. cat /etc/passwd >less

23. Which command below removes only this four-character file
    name containing a special character (and no others):  123*
   *a. rm 123\*
    b. rm 123/*
    c. rm 123\\*
    d. rm 123//*
    e. rm 123*

24. What appears on your screen after this sequence of commands:
       echo aaa >a ; cp a b ; echo bbb >>b ; cat a >b ; cat b
   *a. aaa
    b. aaa followed by bbb
    c. bbb
    d. bbb followed by aaa
    e. no output on screen

25. Which command line lists all possible utilities available for
    sorting files?
   *a. man -k sort
    b. man sort
    c. grep sort /etc/passwd
    d. grep /etc/passwd sort
    e. man | grep sort

26. Which command line lists all possible utilities available for
    compiling programs?
   *a. apropos compile
    b. man compile
    c. grep compile /etc/*
    d. grep /etc/* compile
    e. man * | grep compile

27. In an empty directory, what is the length of the longest file
    name created by the following shell two-command sequence:
       x='a ab abc abcd' ; touch "$x"
   *a. 13 characters
    b. 10 characters
    c. 4 characters
    d. 3 characters
    e. 2 characters

28. In an empty directory, what is the length of the longest file
    name created by the following two-command sequence:
       x='a ab abc abcd' ; touch $x
   *a. 4 characters
    b. 3 characters
    c. 2 characters
    d. 13 characters
    e. 10 characters

29. In an empty directory, what is the length of the longest file
    name created by the following sequence:
       x='a ab abc abcd' ; touch '$x'
   *a. 2 characters
    b. 3 characters
    c. 4 characters
    d. 13 characters
    e. 10 characters

30. Which of these statements is true?
   *a. If /x is an empty directory, cat /x/* produces an error
       message.
    b. If /y is an empty directory, echo /y/* produces an error
       message.
    c. Only single quotes are strong enough to stop shell glob
       (wildcard) patterns from expanding.
    d. Only double quotes are strong enough to stop shell glob
       (wildcard) patterns from expanding.
    e. Only backslashes are strong enough to stop shell glob
       (wildcard) patterns from expanding.

31. How many lines are in the file bar after this command
    sequence: echo hi >x ; echo ho >>x ; cat x x >bar
   *a. 4
    b. 6
    c. 2
    d. 1
    e. nothing - empty file - no data

32. How many arguments and options are there to the command:
       wc -wc /sort
   *a. Two command line arguments, one of which contains two
       bundled options.
    b. Two arguments, one of which is a single option and the
       other is a pathname.
    c. A three-letter file name and a /sort switch option
       argument.
    d. Two arguments, no options.
    e. Two options, no arguments.

33. In an empty directory, how many arguments are passed to the
    sort command in this bash command line?
       who >a1 ; touch a a2 ba ca >all ; sort a*
   *a. 4
    b. 3
    c. 2
    d. 1
    e. none

34. Which command sequence below outputs only lines 11-15 of the
    16-line file named foo?
   *a. head -15 foo | tail -5
    b. tail -15 foo | head -11
    c. head -16 foo | tail -5 foo
    d. head -10 foo | tail -15 foo
    e. tail -10 foo | head -16 foo

35. If directory /dir contains only these three four-character
    file names: .123, .124, .???, then what is the output on your
    screen of the following command line:  echo /dir/????
   *a. /dir/????
    b. /dir/.123 /dir/.124 /dir/.???
    c. /dir/.123 /dir/.124
    d. echo: /dir/????: No such file or directory
    e. no output

36. Which of these command sequences will make file bar contain
    all of the content of file one followed by all of the content
    of file two?
   *a. cat one >bar ; cat two >>bar
    b. cp one >bar ; cp two >>bar
    c. cp one two >bar
    d. mv one two >bar
    e. echo one two >bar

37. If file twenty contains twenty lines, and file thirty
    contains thirty lines, then how many lines are output by this
    command: head twenty | sort thirty
   *a. 30
    b. 10
    c. 20
    d. 40
    e. 50

38. If file x contains ten lines, and file y contains twenty
    lines, then how many lines are in file z after this sequence
    of bash shell commands:
       sort x y >z ; head -5 y >y ; sort x y z >z
   *a. 10
    b. 60
    c. 50
    d. 45
    e. 15

39. In an empty directory, how many words are in file cow after
    this bash shell command line?   touch dog pig cat ; ls >cow
   *a. 4
    b. 3
    c. 2
    d. 1
    e. no output (empty file)

40. What is the output on your screen of this successful command
    sequence?   cd /tmp ; mkdir one ; mkdir two ; pwd
   *a. /tmp
    b. /tmp/one
    c. /tmp/two
    d. /tmp/one/two
    e. /two

41. Which of the following shell command lines displays only the
    names in the current directory that are exactly three lower-
    case letters long?
   *a. echo [a-z][a-z][a-z]
    b. echo [a,z][a,z][a,z]
    c. echo [az][az][az]
    d. echo *a-z*a-z*a-z*
    e. echo ???

42. Which of the following shell command lines displays only the
    names in the current directory that are exactly three digits
    long?
   *a. echo [0-9][0-9][0-9]
    b. echo [1-3][1-3][1-3]
    c. echo [3][3][3]
    d. echo [?][?][?]
    e. echo ???

43. Which of the following statements is true about this shell
    command line:  >four one echo three
   *a. The command one gets exactly two arguments.
    b. The command one gets exactly three arguments.
    c. The command echo gets exactly one argument
    d. The command echo gets exactly two arguments
    e. The command >four gets exactly three arguments.

44. What is in file out after running this bash shell command
    line?  echo 8 1 >out 2 9
   *a. 8 1 2 9
    b. 8 1
    c. 8 1 0
    d. 8 1 >out 2 9
    e. no output (empty file)

45. What is the output on your screen of this bash shell command
    line in an empty directory?   touch foo ; echo bar | ls
   *a. foo
    b. bar
    c. foo followed by bar
    d. bar followed by foo
    e. no output on screen

46. What is the output on your screen of this bash shell command
    line in an empty directory?   touch .bar ; echo foo | ls
   *a. no output on screen
    b. foo
    c. .bar
    d. foo followed by .bar
    e. .bar followed by foo

47. In an empty directory, what is the output on your screen of
    these three commands:
       touch .1 .2 .3 11 12 ; b='.1* .2*' ; echo '$b'
   *a. $b
    b. .1* .2*
    c. '.1* .2*'
    d. .1 .2
    e. 11 .1 12 .2

48. In an empty directory, what is the output on your screen of
    these three commands:
       touch .x .y xx xy xz ; a='x* y*' ; echo "$a"
   *a. x* y*
    b. xx xy xz
    c. xx xy xz y*
    d. $a
    e. .x xx xy xz .y xy

49. In an empty directory, what is the output on your screen of
    these three commands:
       touch .a .b aa bb zz ; z='*' ; echo $z
   *a. aa bb zz
    b. $z
    c. zz
    d. *
    e. no output on screen

50. If foo is a sub-directory that contains only the file single,
    what happens after this command:   mv foo/single foo/././cat
   *a. the directory foo now contains only a file named cat
    b. the directory foo is now empty
    c. there is a second copy of the file single in the file
       named cat
    d. the command fails because the name cat does not exist
    e. the command fails because the name foo/././cat does not
       exist

51. What command shows all the lines in file foo that contain the
    string bar?
   *a. grep bar foo
    b. grep foo bar
    c. cat foo > grep bar
    d. grep cat foo bar
    e. grep bar >foo

52. In the output of command ls -a, the output pathname that is a
    single dot (.) signifies what?
   *a. The current directory.
    b. A name that is hidden.
    c. The parent directory.
    d. A current file.
    e. A name with an unprintable character.

53. In the output of command ls -a, the output pathname that is a
    double dot (..) signifies what?
   *a. The parent directory.
    b. A file or directory with double links.
    c. A hidden file.
    d. The current directory.
    e. The root directory.

54. In the output of command ls -a, a dot that begins a pathname
    signifies what?
   *a. A name that is hidden.
    b. The parent directory.
    c. The current directory.
    d. A current file.
    e. A name with an unprintable character.

55. If your PATH variable contains /bin:/usr/bin, what is the
    output of this bash shell command line?   echo "$PATH"
   *a. /bin:/usr/bin
    b. $PATH
    c. "$PATH"
    d. /bin
    e. "/bin"

56. What is true after this bash shell command line?
       who >cat ; ls -ls cat >head
   *a. The file head contains one line.
    b. The head command reads the output of the ls command.
    c. The ls command reads the output of the cat command on
       standard input.
    d. The cat command receives the output of who on standard
       input.
    e. The shell finds and executes more than two commands.

57. What can you do to get back (redo) the last command you typed
    to the bash (Linux) shell?
   *a. Use the "UpArrow" key.
    b. Use the "PageUp" key.
    c. Type [ALT]-[F2]
    d. Type [CONTROL]-[ALT]-[UP]
    e. Type [CONTROL]-[BACKSPACE]

58. Select the correct bash shell order of command line
    processing:
   *a. quotes, redirection, variables, GLOBs
    b. quotes, variables, redirection, GLOBs
    c. quotes, variables, GLOBs, redirection
    d. quotes, GLOBs, variables, redirection
    e. redirection, quotes, GLOBs, variables

Answer Key - CST8129 - Ian Allen - Fall 2005 - CST8129 Unix Test
                            #1 - 15%

Office use only: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
   1. a                               53. a
   2. a                               54. a
   3. a                               55. a
   4. a                               56. a
    5. a                             57. a
    6. a                             58. a
    7. a
    8. a                           Count of a:  58  100%
   9. a
  10. a                            With 5 choices: 58
  11. a
  12. a                            Macro .cmd split with indent: 15
   13. a
   14. a
   15. a
   16. a
  17. a
  18. a
  19. a
  20. a
   21. a
   22. a
   23. a
   24. a
  25. a
  26. a
  27. a
  28. a
   29. a
   30. a
   31. a
   32. a
  33. a
  34. a
  35. a
  36. a
   37. a
   38. a
   39. a
   40. a
  41. a
  42. a
  43. a
  44. a
   45. a
   46. a
   47. a
   48. a
  49. a
  50. a
  51. a
  52. a