CS 898n - Final Exam - Name:
Date: Wednesday, December 12, 2001, 7:40 - 9:30 PM
Instructions to Examinees:
•This is a close book and close note exam.
•Honesty policy is strictly enforced. You could get zero because of dishonesty.
•Please show all work on exam sheets. You can write on the backside of the exam sheets.
•Time is limited. Please write the key points.
•Any assumption made in answering questions should be stated.
•Points for this paper total 200.
Question 1 - Web Technologies (21 points)
What do these terminologies stand for?
1. DHTML - Dynamic HyperText Markup Language
2. DOM - Document Object Model
3. SAX - Simple API for XML
4. SGML - Standard Generalized Markup Language
5. SOAP - Simple Object Access Protocol
6. XML - Extensible Markup Language
7. XSL - Extensible Stylesheet Language
Question 2 - Perl and CGI (16 points)
The following URL is typical of those observed when performing queries to a search engine:
http://search.yahoo.com/bin/search?p=%22electronic+commerce%22
1. What is the difference between the GET and POST methods?
2. Can you tell which HTML form method is used from this URL? Give the reason for your answer.
3. What is the name of the CGI program which is executed by the Web server? What is the user input
from the HTML form?
4. How does the CGI program access the data which is submitted when this URL is accessed?
Ans: 1. The difference is how the data is retrieved by the CGI program.
In GET method CGI data is formatted in two pieces, separated by a ?
The formatted user input is placed in the environment variable
QUERY_STRING, which is limited to 1024 characters. POST directs the
formatted user input into the standard input buffer.
2. It was specified as GET because the query string is separated by a ?.
3. search is the CGI program.
4. The data is accessed through the environment variable QUERY_STRING.
Question 3 - Internet Database (8 points)
What are three components you need to provide online database access?
Ans: The three components are:
(1) A database that can be created in any computer.
(2) A script or program to reside on the server that can access the data.
(3) A CGI form or applet to send queries to the script or program on the
server.
