Practice Test #2 Questions - answers at end

                             Important Instructions

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

________________________________________________________________________________

                         Multiple Choice - 99 Questions
This is a practice test containing many practice questions.  The real test will
contain some questions similar to these.  There are probably many more questions
in this practice test than there will be time for in the real test.  The real
test will have approximately one question per minute.

The real test may have some questions unlike anything given here.  Knowing the
concepts behind the questions is necessary; memorizing these specific answers
won't help.

The answers to this test are in the Answer Key on the last page(s).

1.  What is the output on your screen of the following sequence of commands:
       x=1 ; y=2 ; [ $x -ge $y ] ; echo $?
    a. 1
    b. no output
    c. test: $x: integer expression expected
    d. 0
    e. the number 0 or 1 followed by another 0 or 1 on a new line

2.  Which command sequence below always outputs just the date only if the first
    argument is both a directory and not empty?
    a. if [ "-s $1" && "-d $1" ]; then date ; fi
    b. if [ -s -a -d "$1" ]; then date ; fi
    c. if [ "$1" -eq -f -a "$1" -eq -d ]; then date ; fi
    d. if [ -s "$1" -a -d "$1" ]; then date ; fi
    e. if [ -n "$1" -o -d "$1" ]; then date ; fi

3.  If foo is a file containing the first column of the output of the last
    command, which command line shows the most frequent login?
    a. cat sort foo | uniq -c | sort -nr | head -1
    b. uniq -c foo | sort -nr | head -1
    c. sort | uniq -c | sort -nr | head -1 foo
    d. sort foo | uniq -c | sort -nr | head -1
    e. sort foo > uniq -c ; sort -nr uniq | head -1

4.  Which of the following PATH statements makes the most sense?
    a. PATH=/usr:/bin:/usr/bin:/etc
    b. PATH=/bin/ls:/etc:/usr/bin
    c. PATH=/bin/sh:/usr/bin:/etc:/bin
    d. PATH=/bin:/usr/bin:/etc/passwd
    e. PATH=/bin:/bin/cat:/usr/bin

5.  Which line below puts the count of the number of lines in the password file
    into the variable foo?
    a. foo=$( awk -F: /etc/passwd | wc -l )
    b. foo=$( wc /etc/passwd | awk echo $1 )
    c. foo=$( cat -c /etc/passwd )
    d. foo=$( wc -l </etc/passwd )
    e. foo=$( wc -l /etc/passwd | awk "print $1" )

6.  If a=cow and b=dog then what is the output on your screen of the following
    sequence of commands:   [ $a = dog -o $b = cow ] ; echo $?
    a. 0
    b. test: $a: integer expression expected
    c. 1
    d. the number 1 or 0 followed by another 1 or 0 on a new line
    e. no output

7.  If /bin/pig is a program that outputs hi and /usr/bin/pig is a program that
    outputs foo what is the output on your screen of this shell command
    sequence: PATH=/etc:/usr/bin:/bin ; pig
    a. foo followed by hi
    b. bash: pig: command not found
    c. foo
    d. hi followed by mom
    e. hi

8.  In a directory containing one file named dog, what appears on your screen
    after this command line?   2>/dev/null ls nosuchfile
    a. nosuchfile
    b. ls: nosuchfile: No such file or directory
    c. bash: 2>/dev/null: command not found
    d. dog
    e. no output on screen

9.  In an empty directory, how many lines are in file foo after this command
    line: ls  nosuchfile  .  ..  2>foo
    a. 2
    b. 1
    c. empty file (no data)
    d. 3
    e. 4

10. What is the output on your screen of this two-command sequence if run in a
    directory containing 888 files with names that are all the numbers from 1 to
    888 inclusive:    cow="*" ; echo '$cow'
    a. the file names 1 through 888, surrounded by quotes
    b. the file names 1 through 888
    c. '$cow'
    d. $cow
    e. *

11. What is the correct syntax to redirect both standard output and standard
    error into the same output file?
    a. command 2>1 >out
    b. command >out 2>1
    c. command 2>out >out
    d. command 2>&1 >out
    e. command >out 2>&1

12. Which command sequence below always outputs just the date only if the first
    argument is either a file or a directory?
    a. if [ -f -o -d "$1" ]; then date ; fi
    b. if [ "-f $1" || "-d $1" ]; then date ; fi
    c. if [ -f || -d "$1" ]; then date ; fi
    d. if [ "$1" -eq -f -o "$1" -eq -d ]; then date ; fi
    e. if [ -f "$1" -o -d "$1" ]; then date ; fi

13. If /bin/foo is a program that outputs dad and /usr/bin/foo is a program that
    outputs mom what is the output on your screen of this shell command
    sequence: PATH=/usr:/etc:/bin:/usr/bin ; foo
    a. mom followed by dad
    b. dad
    c. mom
    d. bash: foo: command not found
    e. dad followed by mom

14. In an empty directory, what is the output on your screen of this three-
    command sequence:   touch aa .a ab .b .c ; x='.a* .b*' ; echo '$x'
    a. aa .a ab .b
    b. $x
    c. .a* .b*
    d. '.a* .b*'
    e. .a .b

15. If /bin/foo is a program that outputs mom and /usr/bin/foo is a program that
    outputs dad what is the output on your screen of this shell command
    sequence: PATH=/bin/foo:/usr/bin/foo:/usr ; foo
    a. mom
    b. mom followed by dad
    c. dad
    d. bash: foo: command not found
    e. dad followed by mom

16. How many arguments are passed to the command by the shell on this command
    line:  <bat bat -b "-a -r" >bat bat bat
    a. 4
    b. 6
    c. 2
    d. 3
    e. 5

17. Which command sequence correctly searches for the chars and then prints OK
    if it is found inside the password file?
    a. if [ test chars /etc/passwd ] ; then echo OK ; fi
    b. if test chars = /etc/passwd ; then echo OK ; fi
    c. if grep chars /etc/passwd ; then echo OK ; fi
    d. if [ grep chars /etc/passwd ] ; then echo OK ; fi
    e. if test chars /etc/passwd ; then echo OK ; fi

18. Which of the following PATH statements makes the most sense?
    a. PATH=/bin:/bin/cat:/usr/bin
    b. PATH=/dev/null:/usr/bin:/etc:/bin
    c. PATH=/dev:/bin:/usr/bin:/etc
    d. PATH=/bin:/usr/bin:/etc/passwd
    e. PATH=/bin/ls:/etc:/usr/bin

19. What is the output on your screen of the following sequence of commands:
       a=sky ; touch $a ; test -z $a ; echo $?
    a. test: $a: integer expression expected
    b. 1
    c. 0
    d. sky
    e. no output

20. What is the output on your screen of the following command sequence if run
    in a directory containing 9 files with names that are all the numbers from 1
    to 9 inclusive:    pat="?" ; echo "$pat"
    a. $pat
    b. "$pat"
    c. ?
    d. the file names 1 through 9
    e. the file names 1 through 9, surrounded by quotes

21. If variable a might contain nothing (a null value - defined but empty),
    which command sequence correctly tests for this and prints the date?
    a. if [ '''' = ''$a'' ] ; then date ; fi
    b. if test "" = "$a" ; then date ; fi
    c. if [ "$a" = * ] ; then date ; fi
    d. if test "" -eq $a ; then date ; fi
    e. if [ $a = /dev/null ] ; then date ; fi

22. What is the output on your screen of the following sequence of commands:
       a=9 ; b=9 ; [ $a -le $b ] ; echo $?
    a. the number 1 or 0 followed by another 1 or 0 on a new line
    b. 0
    c. no output
    d. test: $a: integer expression expected
    e. 1

23. In an empty directory, how many lines are in file out after this bash shell
    command line:  ls  .  ..  nosuchfile  2>out
    a. 2
    b. no output (empty file)
    c. 3
    d. 1
    e. 4

24. What is the output on your screen of the following sequence of commands:
       a=cow ; touch $a ; test -z $a ; echo $?
    a. test: $a: integer expression expected
    b. 1
    c. no output
    d. 0
    e. the number 1 or 0 followed by another 1 or 0 on a new line

25. What is the output on your screen of the following sequence of commands:
       a=1 ; b=2 ; test $a -ge $b ; echo $?
    a. the number 1 or 0 followed by another 1 or 0 on a new line
    b. 1
    c. no output
    d. 0
    e. test: $a: integer expression expected

26. Which line below passes three separate arguments to the cat command when
    placed inside a shell script named foo invoked by the command line:
       ./foo  one  two  three
    a. cat "$#"
    b. cat "$? $? $?"
    c. cat "$*"
    d. cat "$1 $2 $3"
    e. cat "$@"

27. What is the output on your screen of the following sequence of commands:
       x=0 ; y=1 ; touch $x ; test ! -n $x ; echo $?
    a. 1
    b. the number 1 or 0 followed by another 1 or 0 on a new line
    c. no output
    d. 0
    e. test: $x: integer expression expected

28. If a=cow and b=dog then what is the output on your screen of the following
    sequence of commands:   [ $a = cow -a $b = dog ] ; echo $?
    a. 0
    b. no output
    c. test: $a: integer expression expected
    d. the number 1 or 0 followed by another 1 or 0 on a new line
    e. 1

29. Which command line tells you the recursive count of all pathnames under the
    current directory and all subdirectories?
    a. wc "$PATH"
    b. wc .
    c. wc *
    d. ls | wc
    e. find | wc

30. If foo were a file of text containing 50 different lines, what would be the
    output on your screen of this exact command line:  diff foo foo
    a. an error message because diff doesn't allow the same file name twice
    b. no output
    c. the contents of file foo would be displayed
    d. an error message because diff only allows one file name
    e. several lines, which are the lines that are different between the two
       files

31. If a shell script named foo contains the line:
       if [ "$1" = '$2' ] ; then echo SAME ; fi
    then which of the following command lines will produce SAME as output?
    a. ./foo "bar" 'bar'
    b. ./foo bar bar
    c. ./foo "$1" '$2'
    d. ./foo '$2' bar
    e. ./foo $2 $2

32. If the file bat contained the word foo, what would be the output on your
    screen of this two command sequence:
       PATH=/bin/cat:/bin/who:/bin/ls ; cat bat
    a. foo
    b. bat
    c. cat: bat: No such file or directory
    d. no output on screen
    e. bash: cat: command not found

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

34. If a=1 and b=1, which command sequence correctly compares the two numbers as
    equal and prints OK?
    a. if test a == b ; then echo OK ; fi
    b. if [ a -eq b ] ; then echo OK ; fi
    c. if [ $a==$b ] ; then echo OK ; fi
    d. if [ b = a ] ; then echo OK ; fi
    e. if test $b -eq $a ; then echo OK ; fi

35. If variable mt might contain nothing (a null value - defined but empty),
    which command sequence correctly tests for this and prints OK?
    a. if [ "$mt" = * ] ; then echo OK ; fi
    b. if [ "$mt" = "" ] ; then echo OK ; fi
    c. if [ $mt -eq "" ] ; then echo OK ; fi
    d. if [ ''$mt'' = '''' ] ; then echo OK ; fi
    e. if [ $mt -eq : ] ; then echo OK ; fi

36. Which command sequence below always outputs just the date only if the first
    argument is either readable or executable?
    a. if [ -r || -x "$1" ]; then date ; fi
    b. if [ "$1" -eq -r -o "$1" -eq -x ]; then date ; fi
    c. if [ -r -o -x "$1" ]; then date ; fi
    d. if [ -r "$1" -o -x "$1" ]; then date ; fi
    e. if [ "-r $1" || "-x $1" ]; then date ; fi

37. If x=5 and y=5, which command sequence correctly compares the two numbers as
    equal and prints OK?
    a. if test x -eq y ; then echo OK ; fi
    b. if [ $x==$y ] ; then echo OK ; fi
    c. if [ x = y ] ; then echo OK ; fi
    d. if ( x == y ) ; then echo OK ; fi
    e. if test $x -eq $y ; then echo OK ; fi

38. A shell script named foo is executed as follows:  ./foo 1 2 "3 4" 5
    Inside the script is the line:   echo "$3"
    What is the output on your screen from this line?
    a. 3 4
    b. 2 3 4
    c. 1 2 3
    d. $3
    e. "3

39. What is the output on your screen of the following sequence of commands:
       a=cow ; b=dog ; touch $a ; test -z $a ; echo $?
    a. 1
    b. the number 1 or 0 followed by another 1 or 0 on a new line
    c. 0
    d. no output
    e. test: $a: integer expression expected

40. What is the output on your screen of the following command sequence:
       x=1 ; y=2 ; test $x -le $y ; echo $?
    a. 1
    b. test: $x: integer expression expected
    c. 0
    d. no output
    e. the number 0 or 1 followed by another 0 or 1 on a new line

41. Which command sequence correctly compares the two numbers and prints OK?
    a. if ( let 4 > 3 ) ; then echo OK ; fi
    b. if [ 4 -gt 3 ] ; then echo OK ; fi
    c. if [ ! 4 <= 3 ] ; then echo OK ; fi
    d. if ( ! 4 < 3 ) ; then echo OK ; fi
    e. if [ 4 > 3 ] ; then echo OK ; fi

42. Which command line shows just the count of lines in the file?
    a. wc file | awk '{print #1}'
    b. wc file | awk '[print $1]'
    c. wc file | awk '{print $1}'
    d. wc file | awk '{print 1}'
    e. wc file | awk '[print #1]'

43. What is the output on your screen of this two command sequence:
       PATH=/bin/cat:/bin/sh:/bin/ls ; ls nosuchfile
    a. bash: ls: command not found
    b. bash: /bin/ls: command not found
    c. ls: nosuchfile: No such file or directory
    d. bash: /bin/sh: No such file or directory
    e. ls: /bin/ls: command not found

44. What is the correct syntax to redirect both standard output and standard
    error into the same output file?
    a. wc >out 2>1 foo
    b. wc 2>1 >out foo
    c. wc >out 2>out foo
    d. wc >out 2>&1 foo
    e. wc 2>&1 >out foo

45. If a shell script named foo contains the line:
       if [ '$1' = "$2" ] ; then echo SAME ; fi
    then which of the following command lines will produce SAME as output?
    a. ./foo $1 $1
    b. ./foo 'bar' "bar"
    c. ./foo bar 'bar'
    d. ./foo bar '$1'
    e. ./foo 1 "$1"

46. What is the output on your screen of the following command sequence:
       a=sky ; touch $a ; test -z $a ; echo $?
    a. no output
    b. 1
    c. test: $a: integer expression expected
    d. sky
    e. 0

47. Which command sequence below always outputs just the date only if the first
    argument is both not empty and a directory?
    a. if [ -s -a -d "$1" ]; then date ; fi
    b. if [ -s && -d "$1" ]; then date ; fi
    c. if [ -d "$1" -a -s "$1" ]; then date ; fi
    d. if [ "-s $1" && "-d $1" ]; then date ; fi
    e. if [ "$1" -eq -f -a "$1" -eq -d ]; then date ; fi

48. Which of the following bash PATH statements makes the most sense?
    a. PATH=/bin/sh:/usr/bin:/etc:/bin
    b. PATH=/bin:/bin/cat:/usr/bin
    c. PATH=/bin/ls:/etc:/usr/bin
    d. PATH=/bin:/usr/bin:/etc
    e. PATH=/bin:/usr/bin:/etc/passwd

49. Which command tells you the count of lines in the bash manual page?
    a. whereis bash | wc
    b. man bash | wc
    c. which bash | wc
    d. apropos bash | wc
    e. man bash > wc ; cat wc

50. How many arguments are passed to the command by the shell on this command
    line:  <bar bar -b "-a" '-r' >bar bar bar
    a. 5
    b. 4
    c. 6
    d. 3
    e. 2

51. Which line below passes three separate arguments to the sort command when
    placed inside a shell script named foo invoked by the command line:
       ./foo  111  222  333
    a. sort "$*"
    b. sort "$#"
    c. sort "$? $? $?"
    d. sort "$1 $2 $3"
    e. sort "$@"

52. What is the output on your screen of the following sequence of commands:
       a=pig ; b=bat ; touch $b ; test -n $b ; echo $?
    a. 1
    b. test: $b: integer expression expected
    c. 0
    d. no output
    e. the number 0 or 1 followed by another 0 or 1 on a new line

53. What is the output on your screen of the following sequence of commands:
       x=cow ; y=dog ; touch $x ; test -z $x ; echo $?
    a. the number 0 or 1 followed by another 0 or 1 on a new line
    b. no output
    c. test: $x: integer expression expected
    d. 1
    e. 0

54. If a=1 and b=1, which command sequence correctly compares the two numbers as
    equal and prints OK?
    a. if ( a == b ) ; then echo OK ; fi
    b. if [ a = b ] ; then echo OK ; fi
    c. if test a -eq b ; then echo OK ; fi
    d. if [ $a -eq $b ] ; then echo OK ; fi
    e. if [ $a==$b ] ; then echo OK ; fi

55. In an empty directory, how many lines are in file bar after this command
    line: ls  .  nosuchfile  1>bar
    a. 1
    b. 3
    c. 4
    d. empty file (no data)
    e. 2

56. Which line below puts the count of the number of lines in the password file
    into the variable foo?
    a. foo=$( wc -l </etc/passwd )
    b. foo=$( cat -c /etc/passwd )
    c. foo=[ cat -l /etc/passwd ]
    d. foo=[ wc /etc/passwd | echo $1 ]
    e. foo=[ grep -c /etc/passwd ]

57. If /bin/pig is a program that outputs hi and /usr/bin/pig is a program that
    outputs foo what is the output on your screen of this shell command
    sequence: PATH=/etc:/usr/bin:/bin ; pig
    a. foo followed by hi
    b. bash: pig: command not found
    c. hi
    d. foo
    e. hi followed by foo

58. If a=ant and b=bat then what is the output on your screen of the following
    command sequence:   [ $a = ant -a $b = ant ] ; echo $?
    a. 1
    b. no output
    c. 0
    d. test: $a: integer expression expected
    e. the number 1 or 0 followed by another 1 or 0 on a new line

59. In an empty directory, what appears on your screen after this command line?
       ls out 2>/dev/null
    a. no output
    b. ls: /dev/null: No such file or directory
    c. ls: out: No such file or directory
    d. ls: out 2>/dev/null: No such file or directory
    e. out

60. Which correct command sequence below always outputs just the date only if
    the first argument is both not empty and a directory?
    a. if [ -s && -d "$1" ]; then date ; fi
    b. if [ "$1" -eq -f -a "$1" -eq -d ]; then date ; fi
    c. if [ -d "$1" -a -s "$1" ]; then date ; fi
    d. if [ "-s $1" && "-d $1" ]; then date ; fi
    e. if [ -s -a -d "$1" ]; then date ; fi

61. In an empty directory, what appears on your screen after this command line?
       ls 1>/dev/null nosuchfile
    a. no output
    b. ls: 1>/dev/null nosuchfile: No such file or directory
    c. ls: /dev/null: No such file or directory
    d. nosuchfile
    e. ls: nosuchfile: No such file or directory

62. What is the output on your screen of this two-command sequence if run in a
    directory containing 765 files with names that are all the numbers from 1 to
    765 inclusive:    foo="*" ; echo $foo
    a. *
    b. the file names 1 through 765
    c. all the file names that start with an asterisk ('*')
    d. an asterisk ('*') and the file names 1 through 765
    e. $foo

63. Which of these first lines will cause this executable file to be interpreted
    using the Bash shell?
    a. #!/bin/bash
    b. #/bin/bash
    c. /bin/bash -u
    d. !/bin/bash
    e. !#/bin/bash -u

64. Which command sequence correctly searches for foo and then prints the date
    if it is found inside the file bar?
    a. if [ grep foo bar ] ; then date ; fi
    b. if grep <bar foo ; then date ; fi
    c. if [ test foo bar ] ; then date ; fi
    d. if test foo bar ; then date ; fi
    e. if test foo = bar ; then date ; fi

65. If a=cow and b=dog then what is the output on your screen of the following
    sequence of commands:   [ $a = dog -o $b = dog ] ; echo $?
    a. no output
    b. the number 1 or 0 followed by another 1 or 0 on a new line
    c. 1
    d. test: $a: integer expression expected
    e. 0

66. Which command tells you the full absolute pathname of the lynx command?
    a. absolute "$PATH" | grep lynx
    b. echo "$PATH" | grep lynx
    c. absolute lynx
    d. whereis | grep lynx
    e. whereis lynx

67. Which command line shows just the type and permissions of file foo?
    a. ls -l foo | awk ' ' '\n'
    b. tr ' ' '\n' <ls -l foo | head -1
    c. ls -l foo | tr ' ' '\n' | head -1
    d. cat foo | ls -l | awk ' ' '\n' | head -1
    e. ls -l foo | awk ' ' '\n' | head -1

68. If /bin/foo is a program that outputs one and /usr/bin/foo is a program that
    outputs two, what is the output on your screen of this command sequence:
       PATH=/dev:/usr/bin:/usr:/bin:/etc ; /bin/foo
    a. two followed by one
    b. one followed by two
    c. one
    d. two
    e. bash: /bin/foo: command not found

69. If /bin/pig is a program that outputs xx and /usr/bin/pig is a program that
    outputs foo what is the output on your screen of this shell command
    sequence: PATH=/home:/bin:/dev:/usr/bin ; pig
    a. foo
    b. xx followed by foo
    c. foo followed by xx
    d. xx
    e. bash: pig: command not found

70. If your PATH variable contains /bin:/usr/bin, what is the output on your
    screen of this command line:   echo '$PATH'
    a. /bin:/usr/bin
    b. '/bin:/usr/bin'
    c. $PATH
    d. echo: $PATH: No such file or directory
    e. '$PATH'

71. In an empty directory, what is the output on your screen of these commands:
       touch uu .u uv .v uw ; a="*u *v" ; echo "$a"
    a. uu uv
    b. u* v*
    c. uu .u uv .v
    d. *u *v
    e. $a

72. In a directory containing one file named dog, what appears on your screen
    after this command line?   1>/dev/null ls *
    a. bash: 1>/dev/null: command not found
    b. no output on screen
    c. ls: *: No such file or directory
    d. dog
    e. *

73. Which command sequence correctly searches for the chars and then prints OK
    if it is found inside the password file?
    a. if [ grep chars /etc/passwd ] ; then echo OK ; fi
    b. if test chars = /etc/passwd ; then echo OK ; fi
    c. if grep chars </etc/passwd ; then echo OK ; fi
    d. if [ test chars /etc/passwd ] ; then echo OK ; fi
    e. if test chars /etc/passwd ; then echo OK ; fi

74. What is the output on your screen of the following sequence of commands:
       x=pig ; y=bat ; touch $x ; [ -z $x ] ; echo $?
    a. 0
    b. test: $x: integer expression expected
    c. 1
    d. no output
    e. the number 0 or 1 followed by another 0 or 1 on a new line

75. Which of the following PATH statements makes the most sense?
    a. PATH=/bin:/bin/cat:/usr/bin
    b. PATH=/bin:/usr/bin:/etc/passwd
    c. PATH=/bin:/usr/bin:/etc
    d. PATH=/bin/sh:/usr/bin:/etc:/bin
    e. PATH=/bin/ls:/etc:/usr/bin

76. A shell script named bar is executed as follows:  ./bar "a b" "c d e" f
    Inside the script is the line:   echo "$2"
    What is the output on your screen from this line?
    a. $2
    b. a b
    c. b"
    d. c d e
    e. b

77. If a shell script named foo contains the line:
       if [ '$3' = "$2" ] ; then echo SAME ; fi
    then which of the following command lines will always produce SAME as
    output?
    a. ./foo $1 '$2' $3
    b. ./foo 2 '$3' 1
    c. ./foo $3 "$2" $1
    d. ./foo $1 $2 $3
    e. ./foo '$1' "$3" $2

78. What is the output on your screen of the following command sequence:
       a=1 ; b=2 ; test $a -ge $b ; echo $?
    a. 0
    b. 1
    c. the number 1 or 0 followed by another 1 or 0 on a new line
    d. no output
    e. test: $a: integer expression expected

79. What is the output on your screen of the following command sequence:
       f=1 ; touch f ; test ! -z $f ; echo $?
    a. the number 1 or 0 followed by another 1 or 0 on a new line
    b. no output
    c. 0
    d. 1
    e. test: $f: integer expression expected

80. What is the output on your screen of the following sequence of commands:
       x=0 ; y=1 ; touch $x ; test ! -z $x ; echo $?
    a. 1
    b. no output
    c. 0
    d. the number 1 or 0 followed by another 1 or 0 on a new line
    e. test: $x: integer expression expected

81. If /bin/bat is a program that outputs hi and /usr/bin/bat is a program that
    outputs foo what is the output on your screen of this shell command
    sequence: PATH=/etc:/usr/bin:/bin ; bat
    a. hi
    b. hi followed by mom
    c. bash: bat: command not found
    d. foo
    e. foo followed by hi

82. What is the output on your screen of the following sequence of commands:
       x=cow ; y=dog ; test -z $x ; echo $?
    a. test: $x: integer expression expected
    b. no output
    c. 1
    d. the number 0 or 1 followed by another 0 or 1 on a new line
    e. 0

83. Which command line shows the file in /bin with the largest checksum?
    a. cat /bin | sum | sort -nr | head -1
    b. sum /bin/* | sort -nr | head -1
    c. cat /bin/* | sum | sort -nr | head -1
    d. sum /bin | sort -nr | head -1
    e. ls /bin/* | sum | sort -nr | head -1

84. If /bin/foo is a program that outputs one and /usr/bin/foo is a program that
    outputs two, what is the output on your screen of this command sequence:
       PATH=/bin/ls:/home:/usr/bin/cat:/etc ; foo
    a. one followed by two
    b. one
    c. two
    d. two followed by one
    e. bash: foo: command not found

85. Which line below is most likely to be the beginning of an error message?
    a. echo 1<&2 "... "
    b. echo 2>$1 "... "
    c. echo 1>&2 "... "
    d. echo 2<$1 "... "
    e. echo 2>&1 "... "

86. What is the output on your screen of the following sequence of commands:
       x=1 ; touch x ; test ! -z $x ; echo $?
    a. the number 1 or 0 followed by another 1 or 0 on a new line
    b. 1
    c. no output
    d. test: $x: integer expression expected
    e. 0

87. Which command sequence correctly compares the numbers and prints OK?
    a. if ( 1 let 2 ) ; then echo OK ; fi
    b. if [ 1 -lt 2 ] ; then echo OK ; fi
    c. if ( let 2 > 1 ) ; then echo OK ; fi
    d. if [ ! 2 < 1 ] ; then echo OK ; fi
    e. if [ 2 > 1 ] ; then echo OK ; fi

88. Which command sends a file to a remote machine foo.ca?
    a. cat one >foo.ca:two
    b. cp one foo.ca:two
    c. mv one foo.ca:two
    d. scp one >foo.ca:two
    e. scp one foo.ca:two

89. What is the correct syntax to redirect both standard output and standard
    error into the same output file?
    a. sum 2>1 >out foo
    b. sum foo 1>out 2>1
    c. sum >out foo 2>&1
    d. sum 2>&1 foo >out
    e. sum 1>out 2>out foo

90. What is the output on your screen of this two-command sequence if run in a
    directory containing 123 files with names that are all the numbers from 1 to
    123 inclusive:    bat="*" ; echo "$bat"
    a. *
    b. the file names 1 through 123, surrounded by quotes
    c. $bat
    d. "$bat"
    e. the file names 1 through 123

91. If the file bat contained the word foo, what would be the output on your
    screen of this two command sequence:
       PATH=/bin/ls:/bin/who:/etc/passwd ; /bin/ls bat
    a. /bin/ls: bat: No such file or directory
    b. foo
    c. bat
    d. no output
    e. bash: /bin/ls: command not found

92. If /bin/foo is a program that outputs one and /usr/bin/foo is a program that
    outputs two, what is the output on your screen of this command sequence:
       PATH=/etc:/usr/bin:/usr:/bin:/dev ; foo
    a. two followed by one
    b. one
    c. one followed by two
    d. two
    e. bash: foo: command not found

93. What is the output on your screen of the following sequence of commands:
       x=1 ; y=2 ; test $x -le $y ; echo $?
    a. 0
    b. the number 0 or 1 followed by another 0 or 1 on a new line
    c. test: $x: integer expression expected
    d. 1
    e. no output

94. If the file bat contained the word foo, what would be the output on your
    screen of this two command sequence:
       PATH=/etc/passwd:/bin/ls:/bin/cat ; /bin/ls bat
    a. foo
    b. no output
    c. bat
    d. bash: /bin/ls: command not found
    e. /bin/ls: bat: No such file or directory

95. What is the output on your screen of the following sequence of commands:
       x=cow ; y=dog ; touch $y ; test -n $y ; echo $?
    a. no output
    b. 0
    c. 1
    d. test: $y: integer expression expected
    e. the number 0 or 1 followed by another 0 or 1 on a new line

96. In an empty directory, what is the length of the longest file name created
    by the following two-command sequence:    xx="1234 123 12 1" ; touch '$xx'
    a. 1 character
    b. 13 characters
    c. 4 characters
    d. 3 characters
    e. 2 characters

97. If a=cow and b=dog then what is the output on your screen of the following
    sequence of commands:   if $a = $b ; then echo $a ; fi
    a. bash: cow: command not found
    b. no output
    c. cow
    d. test: $a: integer expression expected
    e. test: cow: integer expression expected

98. If a=ant and b=bat then what is the output on your screen of the following
    command sequence:   [ $a = bat -o $b = bat ] ; echo $?
    a. 0
    b. no output
    c. the number 1 or 0 followed by another 1 or 0 on a new line
    d. 1
    e. test: $a: integer expression expected

99. Which of these first lines will cause this executable file to be interpreted
    using the Bash shell?
    a. #!/bin/bash
    b. !#/bin/bash -u
    c. !/bin/bash
    d. $!/bin/bash -u
    e. #/bin/bash

     Answer Key - NET2003 - Ian Allen - Winter 2007 - NET2003 Practice Test

   1. a                                      57. d
   2. d                                      58. a
   3. d                                      59. a
   4. a                                      60. c
    5. d                                      61. e
    6. c                                      62. b
    7. c                                      63. a
    8. e                                      64. b
   9. b                                      65. e
  10. d                                      66. e
  11. e                                      67. c
  12. e                                      68. c
   13. b                                      69. d
   14. b                                      70. c
   15. d                                      71. d
   16. a                                      72. b
  17. c                                      73. c
  18. c                                      74. c
  19. b                                      75. c
  20. c                                      76. d
   21. b                                      77. b
   22. b                                      78. b
   23. d                                      79. c
   24. b                                      80. c
  25. b                                      81. d
  26. e                                      82. c
  27. a                                      83. b
  28. a                                      84. e
   29. e                                      85. c
   30. b                                      86. e
   31. d                                      87. b
   32. e                                      88. e
  33. b                                      89. c
  34. e                                      90. a
  35. b                                      91. c
  36. d                                      92. d
   37. e                                      93. a
   38. a                                      94. c
   39. a                                      95. b
   40. c                                      96. d
  41. b                                      97. a
  42. c                                      98. a
  43. a                                      99. a
  44. d
   45. d                                   Count of a:  19  19%
   46. b                                   Count of b:  22  22%
   47. c                                   Count of c:  23  23%
   48. d                                   Count of d:  20  20%
  49. b                                    Count of e:  15  15%
  50. a
  51. e                                    With 5 choices: 99
  52. c
   53. d                                   Macro .cmd split with good indent: 34
   54. d
   55. a
   56. a