CSCI A348/A548 Final Examination Second Summer 2002

to display HTML documents
to process HTTP requests
to run CGI scripts
all of the above
none of the above

to send e-mail
to read news
to display HTML documents
all of the above
to run CGI scripts
none of the above

software hardware both

true false

A network A Web server A phone line HTTP

a) You don't have access to port 80 (since you are not root).
b) You are running multiple Web servers on the same machine.
c) You don't have enough memory.
d) Both a) and b).
e) All of the above.

true false

Text Images Both text and images Binary data

A simple text editor
A word processing program
An automatic HTML generator
A graphics utility
All of these are capable of creating hypertext documents

They allow the browser and server to communicate
They tell applications what kinds of documents are being sent
They speed the transmission of binary files
FTP uses them to determine how to transfer files

html/text
HTML
text/html
text/plain
none of the above

It generates plain text files with no special characters
Text editors are generally available on all platforms
In many cases it's quicker than using a large application
All of the above
A simple text editor is not useful to a webmaster

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14. Name the three most widely used request methods.

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15. What is the difference between a HEAD and a GET?

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16. What header is sent by the server so that the browser can determine what type of content is being returned?

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17. What is the first thing that is passed to the server when an HTTP transaction begins?

The request line
The response line
The entity body
The transaction line
All of the above could be sent first
None of the above could be sent first

true false

true false

true false

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22. Which of the following are absolute paths? (Check all that apply).

/usr/local/apache/htdocs/
../support/vortex.html
moose.gif
/etc/passwd

/export/home/eric1
../images/backgrounds/water.gif
sales/
./sales/

c:\
c:\html_docs
/opt/apache/htdocs
It depends on how the web server is configured

Which of the following names have we used in this class for default documents?

index.html
default.html
welcome.html
All of the above

true false

true false

A+WeirD&Filename.html
A%2BWeirD%26Filename.html
None of the above
This file cannot be accessed over the web.

true false

Speed
Customization
Easy-to-use GUI configuration
Expensive

true false

true false

A programming language
An API (Application Programming Interface)
A method for a Web server to communicate with other programs
None of the above
All of the above

true false

true false

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Consider the following JavaScript code:

function a(x, y) {
  return x + y;
}
function b(x, y) {
  return x * y;
}
// a = b;
document.write(a(a(3, 4), b(3, 4))); 

37. (2 points) What will the browser display when you load the page in it.

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38. How does the answer change if you uncomment the line currently commented?

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39. (2 points) Consider the following JavaScript code:

function a(x, y) {  
  return y(x, x);
} 
function b(x, y) {  
  return x - y;
} 
document.write(a(b(2, 4), b)); 

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40. (2 points) How do you find out if your server is running, from the Unix prompt?

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41. (2 points) What's in the httpd.pid file?

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42. (2 points) What's ENV and where did we use it? What does it contain?

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43. (8 points) Here's a form:

<html>
  <body bgcolor=white>
    <form method="POST" action="/cgi-bin/alpha">
      <input type=text name="a"> 
      <input type=text name="c"> 
      <input type="submit" value="Proceed">
    </form>
  </body>
</html>

if ($ENV{REQUEST_METHOD} eq 'GET') {

  _________________________________
} else {
  read(STDIN, _______, $ENV{CONTENT_LENGTH});
}

print "Content-type: text/html\n\n";

@in = _____________________________

foreach $e (@in) {
  ($name, $value) = split(/=/, $e);

  __________________________________
  $value =~ s/%(..)/chr(hex($1))/ge;
  print $name, "=(", $value, ")";
}

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45. (2 points) Briefly explain the event handling mechanism in JavaScript.

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46. (2 points) What is the output of the following simple Perl program?

#!/usr/bin/perl
@a = (1, 2, 3, 4);
print $#a;

#!/usr/bin/perl
$a = "There's a tomato in every automaton.";
$a =~ s/tomato/**/g;
print $a;

#!/usr/bin/perl
$a = "My goodness!"; 
$a =~ s/(.)/($1)/;
print $a;     

#!/usr/bin/perl
$a = "My goodness!"; 
$a =~ s/(.)/($1)/g;
print $a;     

50. (2 points) What is the output of the following simple Perl program?

#!/usr/bin/perl
$a = "hOoB!y"; 
$a =~ s/(.)(.)/$2$1/g;
print $a;     

#!/usr/bin/perl
$a = "12345"; 
$a =~ s/(..)/$1+1/g;
print $a;     

#!/usr/bin/perl
$a = "12345"; 
$a =~ s/(..)/$1+1/ge;
print $a;