Test #1 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 - 42 Questions - 6 of 10%

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

2.  How can you ask the bash (Linux) shell to complete commands
    or file names for you?
   *a. Type the first part of the command or file name and press
       the [TAB] key.
    b. Type the first part of the command or file name and press
       the [ALT] key.
    c. Type the first part of the command or file name and press
       the [ALT]-[F1] key.
    d. Type the first part of the command or file name and press
       the [CTRL]-[D] key.
    e. Type the first part of the command or file name and press
       the [CTRL]-[C] key.

3.  If /bin/bash is a file name, which pathname always leads to
    the same file?
   *a. /../bin/./bash
    b. ./../bin/bash
    c. /bin/../bash
    d. /bin/bash/.
    e. /bin/bin/../bash

4.  If you type the command  grep pattern
    which key sequence 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]

5.  If you type the command  sleep 60
    which key sequence 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]

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

7.  Which command line below never shows any lines from inside
    the file cow?
   *a. wc -l cow
    b. head -1 cow
    c. grep pattern cow
    d. sort -r cow
    e. tail -8 cow

8.  How many command arguments does the shell pass to this echo
    command:  echo 'It's "1 2" isn't it? I can't decide.
   *a. Four arguments.
    b. Five arguments.
    c. Six arguments.
    d. Two arguments.
    e. Three arguments.

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

10. Which statement is true, given this long directory listing
    from ls: drwxr-x--x 256 ian user 512 May 30 12:35 dir
   *a. The number 512 is the size of this directory.
    b. The number 512 is the count of links (names) this
       directory has.
    c. The number 256 is the inode number of this directory.
    d. The number 256 is the octal permissions of this directory.
    e. The number 256 is the size of this directory.

11. 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. .   ..
    d. .
    e. no output

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

13. 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 | tail -5 | head -1
   *a. 7
    b. 1
    c. 9
    d. 5 5
    e. 1 1

14. How many lines are in file out after this command line?
       echo hi >dog >out >cat
   *a. no output (empty file)
    b. 1
    c. 3
    d. 2
    e. no such file (file does not exist)

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

16. Which of these statements is true?
   *a. Unix commands must be entered in lower-case letters.
    b. Unix commands can be entered in upper-case or lower-case
       letters; they are equivalent.
    c. You can only login to Unix once per userid; you cannot be
       logged in to the same machine twice.
    d. To erase an entire line of typing, type [CTRL]-[D].
    e. To indicate End-of-File (no more input), type [CTRL]-[C].

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

18. 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.

19. In an empty directory, how many arguments are passed to the
    wc command in this command line?
       date >o1 ; touch a1 b2 out >o1 ; wc o*
   *a. 2
    b. 3
    c. 4
    d. 5
    e. 1

20. If directory /a contains these seven two-character file
    names: aa, ab, ac, ad, a*, a?, ??, then which shell command
    below will remove only the single name a? from the directory?
   *a. rm '/a/a?'
    b. rm /a/?\?
    c. rm /a/a?
    d. rm "/a?"
    e. rm /a\?

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

22. What is in the file cow after this command line:
       echo a >b ; echo b >a ; mv b a >cow
   *a. nothing - empty file - no data
    b. a followed by b
    c. a
    d. b
    e. no such file (nonexistent)

23. If directory cow contains only these four three-character
    file names: .AA, .A1, .BB, .B., then what is the output of
    this command line:  echo cow/*
   *a. cow/*
    b. cow/.AA cow/.A1 cow/.BB cow/.B.
    c. cow/.AA cow/.A1 cow/.BB
    d. cow/.B.
    e. no output

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

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

26. What is the possible output on your screen of this command
    line: echo wc >date ; sort date >date ; cat date
   *a. no output
    b. wc
    c. 1 6 28 date
    d. 1 6 29 date
    e. Mon Sep 27 15:58:34 EDT 2004

27. If I am in my home directory named /home/myhome and dir is an
    empty sub-directory, what is true after this command line:
       touch new ; mv ./dir/../new ../myhome/old
   *a. the parent directory of dir now has a file named old in it
    b. the directory dir now contains only a file named old
    c. there is a second copy of the file new in the file named
       old
    d. the command fails because the path ./dir/../new does not
       exist
    e. the command fails because the path ../myhome/old does not
       exist

28. If file x contains ten lines, and file y contains twenty
    lines, then how many lines are in file cat after this command
    line: sort x y >z ; tail -5 x >x ; sort x y z >cat
   *a. 50
    b. 55
    c. 60
    d. 40
    e. no lines (empty file)

29. If my current directory is /usr, which of these pathnames is
    equivalent to the pathname /usr/x/y/z?
   *a. x/./y/z
    b. /x/y/z
    c. ./usr/x/y/z
    d. ../x/y/z
    e. ../usr/y/z

30. What is the output of this successful command line?
       cd /home/myhome ; mkdir foo ; mkdir bar ; pwd
   *a. /home/myhome
    b. /home/myhome/foo
    c. /home/myhome/bar
    d. /home/myhome/foo/bar
    e. /bar

31. Which command line 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 ???

32. If file twenty contains twenty lines, and file thirty
    contains thirty lines, then how many lines are output by this
    command: tail twenty | cat thirty
   *a. 30
    b. 50
    c. 20
    d. 40
    e. no lines (no output)

33. What is in file two after running this command line?
       echo one >two three four
   *a. one three four
    b. one
    c. echo one
    d. three four
    e. no output

34. What command shows all the lines in file /etc/group that
    contain the string idallen?
   *a. grep idallen /etc/group
    b. grep /etc/group idallen
    c. cat /etc/group > grep idallen
    d. cat /etc/group | wc idallen
    e. grep idallen >/etc/group

35. In the output of the command ls -i -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 name with an unprintable character.
    e. An inode (index) numbered file.

36. Which Unix command line deletes a directory and everything
    inside it?
   *a. rm -r dir
    b. rm -all dir
    c. rmdir -r dir
    d. rmdir -all dir
    e. deltree -all dir

37. When doing an ls -a, the output pathname that is a double dot
    (..) signifies what?
   *a. The parent directory.
    b. A hidden file.
    c. The current directory.
    d. The root directory.
    e. A pathname with double links.

38. What appears on your screen after this command line?
       mkdir xx ; rmdir xx | wc -c
   *a. 0
    b. 1
    c. 2
    d. 3
    e. no output

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

40. Which of these commands always returns you to your account
    home directory?
   *a. cd
    b. cd /home
    c. cd home
    d. cd ..
    e. cd /home/..

41. In an empty directory, how many files are created by this
    command:  touch a  "b c"  '  '  d  e
   *a. 5
    b. 6
    c. 7
    d. 3
    e. 4

42. Which command line displays all the non-hidden names in the
    current directory that contain the letter x (and no others)?
   *a. *x*
    b. ?x?
    c. [x]
    d. *x
    e. x*

Answer Key - DAT2330 - Ian Allen - Fall 2004 - DAT2330 Unix Test
                            #1 - 10%

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