Unix Test #1
DAT2330 - Ian Allen - Winter 20-1-		       45 minutes

Evaluation: 42 Questions	  Name: _________________________
		      Important Instructions

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


(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)

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

2.  Which command line below does not show any lines from inside
    the file out?
    a. wc out
    b. head -99 out
    c. tail out
    d. sort -n out
    e. more out

3.  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]-[DEL]
    e. Type [CONTROL]-[BACKSPACE]

4.  What command shows all the lines in file out that contain the
    string foo?
    a. grep <out foo
    b. grep out foo
    c. cat out > grep foo
    d. grep out foo | cat
    e. grep foo >out

5.  Which command sequence outputs inode/filename pairs for names
    in the current directory, sorted by inode number?
    a. ls -ai | sort -n
    b. sort -n | ls -ai
    c. ls -i * > sort -n
    d. ls -node * > sort -n
    e. ls ./* | sort -node









42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes



DAT2330 - Ian Allen - Winter 20-2-		       45 minutes

6.  What is in the file bar after this command sequence:
       echo hi >x ; echo ho >x ; mv x y >bar
    a. nothing - empty file - no data
    b. hi followed by ho
    c. hi
    d. ho
    e. no such file (nonexistent)

7.  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

8.  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

9.  Which of the command lines below can generate a non-empty
    file?
    a. ls -ls file >file
    b. tr a b <file >file
    c. awk '{print $1}' file >file
    d. touch file >file
    e. uniq file >file

10. In the output of the command ls -a, a dot that begins a name
    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.

11. Which command below sorts only this five-character file name
    containing a special character (and no others):   xx?xx
    a. sort "xx?xx"
    b. sort xx?xx
    c. sort xx/?xx
    d. sort ''xx?xx''
    e. sort ""xx?xx""

12. Which command below removes only this five-character file
    name containing a special character (and no others):   yy?yy
    a. rm yy\?yy
    b. rm yy/?yy
    c. rm yy\\?yy
    d. rm yy//?yy
    e. rm yy?yy





42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes



DAT2330 - Ian Allen - Winter 20-3-		       45 minutes

13. If you type the command  xload
    which of the following key sequences will interrupt it and
    take you immediately back to the command prompt?
    a. [CTRL-C]
    b. [CTRL-D]
    c. [CTRL-L]
    d. [CTRL-U]
    e. [CTRL-R]

14. If you type the command  tr a b
    which of the following key sequences will send an EOF and
    take you immediately back to the command prompt?
    a. [CTRL-D]
    b. [CTRL-C]
    c. [CTRL-L]
    d. [CTRL-U]
    e. [CTRL-R]

15. If I am in my home directory named /home/ian and mt is an
    empty sub-directory, what is true after this command line:
       who >../ian/cat ; cp ./mt/../cat ./mt/../dog
    a. the directory mt is still empty
    b. the directory mt now has a file named dog in it
    c. the directory mt now contains two files
    d. there is a second copy of the file named who in the file
       dog
    e. the command fails because the path ./mt/../cat does not
       exist

16. How many command arguments does the shell pass to this echo
    command:  echo 'It's a bird! It's a plane!'
    a. Four arguments.
    b. Five arguments.
    c. One argument.
    d. Two arguments.
    e. Three arguments.

17. How many arguments does the shell pass to this echo command:
       echo " 1 2 " three ' 4 ' five"6"
    a. Four arguments.
    b. Three arguments.
    c. Five arguments.
    d. One argument.
    e. Nine arguments.

18. Which of the following is true, given this long directory
    listing from ls:
       drwxr-x--x 456 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 456 is the inode number of this directory.
    d. The number 456 is the octal permissions of this directory.
    e. The number 456 is the size of this directory.






42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes



DAT2330 - Ian Allen - Winter 20-4-		       45 minutes

19. Which of these command sequences will make file foo contain
    all of the content of file a followed by all of the content
    of file b?
    a. cat a >foo ; cat b >>foo
    b. cp a >foo ; cp b >>foo
    c. cp a b >foo
    d. mv a b >foo
    e. echo a b >foo

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

21. What is the output of this successful command sequence?
       cd /tmp ; mkdir foo ; mkdir bar ; pwd
    a. /tmp
    b. /tmp/foo
    c. /tmp/bar
    d. /tmp/foo/bar
    e. /bar

22. Which of the following pathnames always leads to the same
    file named: /etc/passwd?
    a. /etc/../etc/passwd
    b. /etc/./etc/../passwd
    c. /etc/passwd/.
    d. ./etc/passwd
    e. ../etc/passwd

23. How many arguments and options are there to the command:
       ls -ls /cat
    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 /cat switch option
       argument.
    d. Two arguments, no options.
    e. Two options, no arguments.

24. 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. Push key F1 and the system will present a menu of
       commands.
    d. Type [CONTROL]-[D] and the shell will present a menu of
       commands.
    e. Type [CONTROL]-[C] and the shell will present a menu of
       commands.




42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes



DAT2330 - Ian Allen - Winter 20-5-		       45 minutes

25. Which command below is the best way to find a line containing
    an asterisk (*) in the file named foo?
    a. grep '*' <foo
    b. grep * foo
    c. grep foo "*"
    d. grep <foo [*]
    e. grep ./* foo

26. When doing an 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.

27. What command can you use to remove a directory that isn't
    empty?
    a. rm -r dir
    b. del -r dir
    c. rmdir -r dir
    d. deldir -r dir
    e. mv -r dir

28. Which command sequence below outputs only lines 10-15 of the
    16-line file named hex?
    a. head -15 hex | tail -6
    b. tail -16 hex | head -10
    c. head -16 hex | tail -5 hex
    d. head -10 hex | tail -15 hex
    e. tail -10 hex | head -16 hex

29. 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 of this command:
       sort nine nine nine | tail -3 | head -1
    a. 9
    b. 8
    c. 7
    d. 7 7 7
    e. 1 1 1

30. Which of the following shell command lines displays all the
    names in the current directory that are exactly three digits
    long (and no others)?
    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 ???










42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes



DAT2330 - Ian Allen - Winter 20-6-		       45 minutes

31. If file x contains ten lines, and file y contains twenty
    lines, then how many lines are in file cat after this
    sequence of bash shell commands:
       sort x y >z ; tail -5 y >y ; sort x y z >cat
    a. 40
    b. 45
    c. 50
    d. 60
    e. no lines (empty file)

32. If file ten contains ten lines, and file twenty contains
    twenty lines, then how many lines are output by this command:
       cat twenty | sort ten
    a. 10
    b. 20
    c. 30
    d. 60
    e. no lines (no output)

33. If directory foo contains only these three three-character
    file names: .11, .12, ..., then what is the output of the
    following bash shell command line:	echo foo/???
    a. foo/???
    b. foo/.11 foo/.12 foo/...
    c. foo/.11 foo/.12
    d. foo/...
    e. no output

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

35. What appears on your screen after this bash shell command
    line?  echo hi >ls ; cat ls > wc
    a. no output
    b. 1  1  2
    c. 1  1  3
    d. ls
    e. hi

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








42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes



DAT2330 - Ian Allen - Winter 20-7-		       45 minutes

37. 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 >foo 2>$1
    d. ls -l 2>$1 >foo
    e. ls -l >foo 2>foo

38. In an empty directory, what is in file count after this bash
    command line?   ls ??? | wc -w >count
    a. 0
    b. 1
    c. 1 1 1
    d. 1 1 2
    e. no output (empty file)

39. What text is output by this bash shell command sequence:
       echo cow >foo ; echo dog | head -1 foo
    a. cow
    b. dog
    c. foo
    d. cow followed by dog
    e. dog followed by cow

40. In an empty directory, what appears on your screen after this
    bash 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

41. In an empty directory, how many words are in file out after
    this bash shell command line?   touch 1 2 3 2 1 ; ls >out
    a. 4
    b. 5
    c. 6
    d. 3
    e. no output (empty file)

42. What is in file out after running this bash shell command
    line?  echo 2 3 >out 3 0
    a. 2 3 3 0
    b. 2 3
    c. 2 3 0
    d. 2 3 >out 3 0
    e. no output (empty file)













42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes



DAT2330 - Ian Allen - Winter 20-8-		       45 minutes

Answer Key - DAT2330 - Ian Allen - Winter 2004 - DAT2330 Test #1
			  - Unix - 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
   1. a				   Macro .ans splits: 0
   2. a
   3. a
   4. a
    5. a
    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

Count of a:  42	 100%

With 5 choices: 42
 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

Macro .cmd splits: 11


42 Questions	   DAT2330 Test #1 - Unix - 15%	       45 minutes