Test #2 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.

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            Multiple Choice - 57 Questions - 12 of 25%

(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)

1.  A Makefile contains the following target:  dog: foo bar
    which means:
   *a. item dog depends on items foo and bar
    b. items foo and bar depend on item dog
    c. items dog and foo depend on item bar
    d. item bar depends on items dog and foo
    e. the syntax "dog:" is not valid in a Makefile target

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

3.  Given my directory dir and my file dir/foo owned by me, which
    permissions allow me to delete the file from the directory,
    but not change the content (data) in the file?
   *a. Permissions 300 on directory dir and 500 on file dir/foo.
    b. Permissions 100 on directory dir and 200 on file dir/foo.
    c. Permissions 100 on directory dir and 100 on file dir/foo.
    d. Permissions 300 on directory dir and 300 on file dir/foo.
    e. Permissions 500 on directory dir and 400 on file dir/foo.

4.  Given my directory dir and my file dir/bar owned by me, which
    permissions allow me to access and change the content (data)
    in the file dir/bar but not delete the file?
   *a. Permissions 100 on directory dir and 200 on file dir/bar.
    b. Permissions 500 on directory dir and 500 on file dir/bar.
    c. Permissions 600 on directory dir and 200 on file dir/bar.
    d. Permissions 300 on directory dir and 500 on file dir/bar.
    e. Permissions 700 on directory dir and 300 on file dir/bar.

5.  In response to the following command line:
       read  one  two  three
    which user keyboard input line below will assign the text bb
    to the shell variable named two?
   *a. aa  bb  cc
    b. one=aa  two=bb  three=cc
    c. aa,bb,cc
    d. aa:bb:cc
    e. aa;bb;cc

6.  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=/usr:/usr/bin:/etc:/bin ; foo
   *a. dad
    b. mom
    c. mom followed by dad
    d. dad followed by mom
    e. bash: foo: command not found

7.  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:/dev:/usr/bin/foo:/usr ; foo
   *a. bash: foo: command not found
    b. mom
    c. dad
    d. mom followed by dad
    e. dad followed by mom

8.  If bat=55 and cat=66 then which of the following command
    lines outputs only the date (and nothing else)?
   *a. [ bat = bat ] && date
    b. [ bat -ne cat ] && date
    c. [bat != cat] && date
    d. [bat != cat] || date
    e. [bat -eq 66] || date

9.  If cow=cow and pig=pig then which of the following command
    lines outputs only the date (and nothing else)?
   *a. test cow = cow && date
    b. test cow -ne pig && date
    c. [!cow = pig] && date
    d. [cow -ne pig] || date
    e. [cow!=cow] || date

10. If cow=cow and pig=pig then which of the following command
    lines outputs only the date (and nothing else)?
   *a. [ cow = pig ] || date
    b. [ cow -ne pig ] && date
    c. test !cow = pig && date
    d. [cow -eq pig] || date
    e. test cow=cow || date

11. If dog is an executable script containing the line:
       umask 0002
    what is the output on your screen of the following sequence
    of commands:  umask 0077 ; ./dog ; umask
   *a. 0077
    b. 0002
    c. 0079
    d. 0075
    e. no output on screen

12. 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. sort <foo | uniq -c | sort -nr | head -1
    b. cat sort foo | uniq -c | sort -nr | head -1
    c. uniq -c foo | sort -nr | head -1
    d. sort | uniq -c | sort -nr | head -1 foo
    e. sort foo > uniq -c ; sort -nr uniq | head -1

13. If foo is an executable script containing the line:
       PATH=/bin ; export PATH
    what is the output on your screen of the following sequence
    of commands:  PATH=/etc ; ./foo ; echo "$PATH"
   *a. /etc
    b. /bin
    c. foo
    d. /etc:/bin
    e. $PATH

14. If foo is an executable script containing the line:
       PATH=/bin ; export PATH
    what is the output on your screen of the following sequence
    of commands:  PATH=/etc ; source ./foo ; echo "$PATH"
   *a. /bin
    b. /etc
    c. foo
    d. /etc:/bin
    e. $PATH

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

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

17. 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. 0
    c. the number 1 or 0 followed by another 1 or 0 on a new line
    d. test: $a: integer expression expected
    e. no output

18. 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. 1
    c. the number 1 or 0 followed by another 1 or 0 on a new line
    d. test: $a: integer expression expected
    e. no output

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

20. 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. bash: cat: command not found
    b. bat
    c. foo
    d. cat: bat: No such file or directory
    e. no output on screen

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

22. 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: /bin/ls: command not found
    d. ls: nosuchfile: No such file or directory
    e. bash: /bin/sh: No such file or directory

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

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

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

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

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

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

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

30. 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. *u *v
    b. u* v*
    c. uu uv
    d. uu .u uv .v
    e. $a

31. In an empty directory, what is the length of the longest file
    name (including extension) after this sequence of commands?
       date >four ; cp four five5 ; mv five5 hi ; bzip2 hi
   *a. 6
    b. 5
    c. 4
    d. 3
    e. 7

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

33. 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

34. The correct g++ compiler suffix for a C++ source file is:
   *a. .cpp
    b. .cplus
    c. .g++
    d. .gpp
    e. .C++

35. The correct option to enable warning messages from the g++
    compiler is:
   *a. -Wall
    b. -wall
    c. -warn
    d. +Warn
    e. -w

36. What is the correct syntax to redirect both standard output
    and standard error into the same output file?
   *a. ls -l >foo 2>&1
    b. ls -l 2>&1 >foo
    c. ls -l 1>foo 2>foo
    d. ls -l 2&1>foo
    e. ls -l 1&2>foo

37. What is the output on your screen if a user signals an end-
    of-file from the keyboard during this command sequence?
       read input || echo "$?"
   *a. 1
    b. no output on screen
    c. $?
    d. 0
    e. an error message

38. What is the output on your screen of the following command
    sequence:   a=1 ; b=2 ; [ ! $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. test: $a: integer expression expected
    e. no output

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

40. What is the output on your screen of this sequence of three
    shell commands:  umask 162 ; touch newfile ; ls -l newfile
   *a. -rw----r-- 1 foo foo 0 Apr 1 1:12 newfile
    b. ---xrw--w- 1 foo foo 0 Apr 1 1:12 newfile
    c. ----rw--w- 1 foo foo 0 Apr 1 1:12 newfile
    d. -rw---xr-x 1 foo foo 0 Apr 1 1:12 newfile
    e. -rw---x-w- 1 foo foo 0 Apr 1 1:12 newfile

41. What is the output on your screen of this sequence of three
    shell commands:  umask 457 ; mkdir dir ; ls -ld dir
   *a. d-wx-w---- 2 foo foo 64 Mar 9 1:12 dir
    b. d-w--w---- 2 foo foo 64 Mar 9 1:12 dir
    c. d-wx-w-rwx 2 foo foo 64 Mar 9 1:12 dir
    d. dr--r-xrwx 2 foo foo 64 Mar 9 1:12 dir
    e. dr-xr-xrwx 2 foo foo 64 Mar 9 1:12 dir

42. What minimal permissions must you have on a directory to be
    able to execute successfully the command ls . from inside the
    directory?
   *a. r-x
    b. --x
    c. r--
    d. -wx
    e. rw-

43. Which command counts the number of Unix permission groups you
    are in?
   *a. groups | wc
    b. umask | wc
    c. id | wc
    d. echo /etc/groups | wc
    e. wc /etc/groups

44. Which command line below allows programs in the current
    directory to execute without preceding the names with ./?
   *a. PATH=/usr/bin:.:/bin
    b. PATH=/usr/bin/.:$HOME
    c. PATH=./$HOME:/usr/bin
    d. $PATH=/usr/bin:./bin
    e. $PATH=.:$HOME:/usr/bin

45. Which command line copies all the files from directory a to
    directory b?
   *a. cd a ; tar czf /tmp/i . ; cd ../b ; tar xzf /tmp/i
    b. cd a ; tar czf /tmp/i . ; cd ../b ; tar xvf /tmp/i
    c. cd a ; tar xf /tmp/i . ; cd ../b ; tar czvf /tmp/i
    d. cd a ; tar -r /tmp/i . ; cd ../b ; tar -rvx /tmp/i
    e. cd a ; tar -rc /tmp/i . ; cd ../b ; tar -rx /tmp/i

46. Which command line locates scripts in the /bin directory?
   *a. file /bin/* | grep script
    b. file /bin | grep script
    c. cat /bin/* | file | grep script
    d. cat /bin | file | grep script
    e. ls /bin/* | file | grep script

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

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

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

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

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

52. 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 $3"
    e. cat "$? $? $?"

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

54. Which of these commands makes a file owned by me, also
    executable by me (without changing any other permissions)?
   *a. chmod u+x myfile
    b. chmod x+u myfile
    c. chmod x=u myfile
    d. umask 100 myfile
    e. chmod 100 myfile

55. What is the meaning of this SysV init script pathname:
    /etc/rc3.d/S04httpd
   *a. start the web server in run level 3, sort order 4
    b. start the web server in run level 4, sort order 3
    c. stop the web server in run level 3, sort order 4
    d. start the web server in run level 04; stop it in run level
       3
    e. start the web server in run level 3; stop it in run level
       04

56. Which of these lines fetches an entire raw index web page
    using the http protocol?
   *a. GET /index.html HTTP/1.0
    b. HEAD /index.html HTTP/1.0
    c. HEAD HTTP/1.0 index.html
    d. GET HTTP/1.0 index.html
    e. HEAD HTTP/1.0 /index.html

57. Which line will show you the default run level for your
    system?
   *a. grep initdefault /etc/inittab
    b. grep default /etc/rc?.d
    c. grep init /etc/rc?.d/*
    d. grep default /etc/init.d
    e. grep init /etc/init.d/*

Answer Key - NET2003 - Ian Allen - Winter 2005 - NET2003 Unix
                          Test #2 - 25%

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
   1. a                               53. a
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    7. a                           Count of a:  57  100%
    8. a
   9. a                            With 5 choices: 57
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   15. a                            54 55 56 57
   16. a
  17. a                            Macro .cmd split no indent: 0
  18. a                            Macro .cmd split with indent: 18
  19. a                            Macro .ans splits: 0
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