Test #4 Multiple Choice

                      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 - 44 Questions - 12 of 35%

(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)

1.  Which command sequence below does not generate an error
    message from the last command in the sequence?
   *a. mkdir ddd ddd/fff fff ; rmdir ddd/fff
    b. mkdir foo bar ; ln foo xxx
    c. date >foo ; cp foo/. bar
    d. cat /etc/passwd > mail idallen@idallen.ca
    e. mkdir foo ; touch foo/bar ; rmdir foo

2.  What is the link count of directory x after this set of
    successful commands?
       mkdir x ; mkdir x/y ; mkdir x/z ; mkdir x/y/z
   *a. 4
    b. 3
    c. 2
    d. 5
    e. 1

3.  What is the link count of directory d after this set of
    successful commands?   mkdir d ; mkdir d/a ; touch d/b
   *a. 3
    b. 2
    c. 5
    d. 1
    e. 4

4.  What is the link count of directory d after this set of
    successful commands?   mkdir d ; touch f ; cd d ; ln ../f x
   *a. 2
    b. 5
    c. 3
    d. 1
    e. 4

5.  What is the link count of directory d after this set of
    successful commands?
       mkdir d ; cd d ; touch f ; ln f x ; ln f y
   *a. 2
    b. 5
    c. 3
    d. 1
    e. 4

6.  What is the link count of directory d after this set of
    successful commands?   mkdir d ; cd d ; touch a ; mkdir b c d
   *a. 5
    b. 4
    c. 3
    d. 2
    e. 6

7.  What is the link count of file f after this set of successful
    commands?
    rm f ; touch f ; cp f x
    ln f a ; ln x y ; ln a z ; ln x b
   *a. 3
    b. 4
    c. 5
    d. 6
    e. 2

8.  What will appear on your screen after this sequence of
    commands:
      echo one >x ; ln x y ; echo ten >y ; echo two >x ; cat y
   *a. two
    b. ten
    c. one
    d. one followed by ten and two
    e. no output on screen

9.  What will appear on your screen if you execute this sequence
    of commands in your home directory:
       ln /etc/passwd bar ; ln bar foo ; echo hi >foo ; cat foo
   *a. an error message and then the contents of the password
       file
    b. the conents of the password file followed by hi
    c. an error message and then hi
    d. hi
    e. foo

10. What will appear on your screen if you execute this sequence
    of commands:
       echo 1 >a ; ln a b ; echo 2 >b ; chmod 266 b ; cat a
   *a. an error message
    b. 1
    c. 2
    d. 1 followed by 2
    e. no output on screen

11. Who is the owner of file bar after you execute this sequence
    of commands in your home directory:
       ln /etc/passwd x ; ln x y ; cp y z ; ln y bar
   *a. the file is owned by root
    b. you own the file bar
    c. the file is owned by home
    d. the file is owned by passwd
    e. you cannot execute the given commands; no file will be
       created

12. If file foo occupies two disk blocks, how many disk blocks
    are in use after this sequence of commands:
       cp foo bar ; ln bar one ; cp one two ; ln one ten
   *a. 6 blocks
    b. 4 blocks
    c. 2 blocks
    d. 8 blocks
    e. 10 blocks

13. What appears on your screen after this sequence of commands:
       echo 1 >x ; ln x y ; echo 2 >>y ; head -1 x >y ; cat y
   *a. empty file - no output on the screen
    b. 1
    c. 2
    d. 1 followed by 2
    e. 2 followed by 1

14. What appears on your screen after this sequence of commands:
       echo 1 >x ; cp x y ; echo 2 >>y ; sort x >y ; cat y
   *a. 1
    b. 1 followed by 2
    c. 2
    d. 2 followed by 1
    e. empty file - no output on the screen

15. What appears on your screen after this sequence of commands:
       echo 1 >x ; ln x y ; echo 2 >>y ; sort x
   *a. 1 followed by 2
    b. 1
    c. 2
    d. 2 followed by 1
    e. empty file - no output on the screen

16. What is true about this output from ls -il foo bar
    23 -rwxr----- 3 root root 2 Jul 31 12:33 foo
    24 -rwxr----- 3 root root 2 Jul 31 12:33 bar
   *a. foo and bar are names for different files
    b. foo and bar are names for the same file
    c. foo and bar are two of three names for this file
    d. foo and bar each have two names (four names total)
    e. this output is not possible

17. What is true about this output from ls -il foo bar
    72 -rwxrwxrwx 2 bin  bin  3 Oct 30 09:23 foo
    72 -r--r--r-- 2 bin  bin  3 Oct 30 09:23 bar
   *a. this output is not possible
    b. foo and bar are names for different files
    c. foo and bar are names for the same file
    d. foo and bar are two of three names for this file
    e. foo and bar each have two names (four names total)

18. What is true about this output from ls -ild foo bar
    96 -rwxr-xr-x 2 root root 3 Jan 24 01:03 foo
    96 -rwxr-xr-x 3 root root 3 Jan 24 01:03 bar
   *a. this output is not possible
    b. foo and bar are names for different files
    c. foo and bar are names for the same file
    d. foo and bar are two of five names for this file
    e. foo and bar each have three names (six names total)

19. What is true about this output from ls -il foo bar
    15 -r-x-----x 2 bin  bin  3 Oct 30 09:23 foo
    15 -r-x-----x 2 bin  bin  3 Oct 30 09:23 bar
   *a. foo and bar are names for the same file
    b. foo and bar are names for different files
    c. foo and bar are two of three names for this file
    d. foo and bar each have three names (six names total)
    e. this output is not possible

20. What is true about this output from ls -il foo bar
    35 -rw-rw-r-- 2 bin  bin  3 Jan 24 01:03 foo
    36 -rw-rw-r-- 2 bin  bin  3 Jan 24 01:03 bar
   *a. foo and bar each have two names (four names total)
    b. foo and bar each have three names (six names total)
    c. foo and bar are names for the same file
    d. foo and bar are two of three names for this file
    e. this output is not possible

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

22. A Makefile contains the following lines:
    one:
            rm foo bar
    This means:
   *a. if the user types "make one", items foo and bar will be
       removed
    b. if the user types "make foo", items foo and bar will be
       removed
    c. if the user types "make bar", items foo and bar will be
       removed
    d. if the user types "make rm", items foo and bar will be
       removed
    e. the syntax "one:" is not valid in a Makefile target

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

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

25. The default output file generated by the C and C++ compilers
    is named:
   *a. a.out
    b. a.cpp
    c. a.c++
    d. a.o
    e. argv

26. In an empty directory, what is the length of the longest file
    name (including extension) after this sequence of commands?
       date >sixsix ; cp sixsix no ; mv sixsix four ; gzip no
   *a. 5
    b. 4
    c. 3
    d. 2
    e. 6

27. 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

28. 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

29. 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. no output on screen
    b. $?
    c. 0
    d. 1
    e. an error message

30. 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

31. 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

32. 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 test "" = "$a" ; then date ; fi
    b. if [ $a = /dev/null ] ; then date ; fi
    c. if test "" -eq $a ; then date ; fi
    d. if [ '''' = ''$a'' ] ; then date ; fi
    e. if [ "$a" = * ] ; then date ; fi

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

34. If directory /000 contains these three four-character file
    names: .abc, .xyz, .???, then what is the output on your
    screen of the following command line:  echo /000/????
   *a. /000/????
    b. /000/.abc /000/.xyz /000/.???
    c. /000/.abc /000/.xyz
    d. echo: /000/????: No such file or directory
    e. no output

35. 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

36. 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 test foo = bar ; then date ; fi
    e. if [ test foo bar ] ; then date ; fi

37. 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

38. What is the output on your screen of this command sequence:
       echo bat >pig ; echo one | tail pig
   *a. bat
    b. one
    c. bat followed by one
    d. one followed by bat
    e. an error message

39. 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

40. What is the output on your screen of this two-command
    sequence:   cd /home || echo "cd $(pwd)"
   *a. no output
    b. cd /home
    c. cd 0pwd)
    d. cd $(pwd)
    e. /home

41. What is the output on your screen of this sequence of three
    shell commands:  umask 475 ; mkdir dir ; ls -ld dir
   *a. d-wx----w- 2 it it 400 Jul 3 8:00 dir
    b. d-w-----w- 2 it it 400 Jul 3 8:00 dir
    c. d-wxrwx-w- 2 it it 400 Jul 3 8:00 dir
    d. dr--rwxr-x 2 it it 400 Jul 3 8:00 dir
    e. dr-xrwxr-x 2 it it 400 Jul 3 8:00 dir

42. What is the output on your screen of this sequence of three
    shell commands:  echo ls >cat ; >cat ls cat ; wc cat
   *a. 1 1 4 cat
    b. 1 1 3 cat
    c. 1 1 2 cat
    d. 0 0 0 cat
    e. no output

43. What is the output on your screen of the following sequence
    of commands:   x=0 ; [ $x = 00 ] ; echo $?
   *a. 1
    b. 0
    c. the number 0 or 1 followed by another 0 or 1 on a new line
    d. test: $x: integer expression expected
    e. no output

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

Answer Key - DAT2330 - Ian Allen - Fall 2004 - DAT2330 Unix Test
                            #4 - 35%

Office use only: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
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42 43 44
   1. a                             44
   2. a
   3. a                            Macro .cmd split no indent: 0
   4. a                            Macro .cmd split with indent: 18
    5. a                           Macro .ans splits: 0
    6. a
    7. a
    8. a
   9. a
  10. a
  11. a
  12. a
   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

Count of a:  44  100%

With 5 choices: 44
 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