Web-based computing

Question 1

What is the definition of web-based computing?

Answer 1

“Distributed systems that use browsers as clients and webservers as servers”

Question 2

What are the pros and cons of web-based computing?

Answer 2

Pros:

• Anyone with a browser can use it

Cons:

• Web wasn’t original designed for anything but information distribution (reflected in HTTP)
• Web computing systems rely heavily on server oriented processes
• Web computing limits app functionality
  
  • Most operations involve a server (delays)
• Heavy interaction can be problematic over the net
• Control over display issues

Question 3

What does HTTP stand for?

Answer 3

Hyper Text Transfer Protocol

Question 4

What is the general process of a HTTP?

Answer 4

Question 5

In general, what do basic HTTP requests/responses include?

Answer 5

Question 6

What does a request line look like?

Answer 6

Question 7

What does a response line look like?

Answer 7

Question 8

In general how do headers work?

Answer 8

Question 9

How many headers does HTTP 1.0 and 1.1 define?

Answer 9

Question 10

What HTTP headers should always be included?

Answer 10

Question 11

How does the Server header work?

Answer 11

Question 12

What is Last-modified Header? Provide an example

Answer 12

Question 13

What does the header Last-Modified do? provide an example.

Answer 13

Question 14

If an HTTP message includes a body, there are usually header lines that describe the body. What are they?

Answer 14

Question 15

What does the browser process and request look like when trying to retrieve a document at URL:

http://www.cs.umanitoba.ca/path/f.html

Answer 15

Question 16

What would the server response look like for:

When a client tries to retrieve a document at URL:

http://www.cs.umanitoba.ca/path/f.html

Answer 16

Question 17

What is a HEAD request and how does it work?

Answer 17

Question 18

In general, what is a POST request and how does it differ from GET?

Answer 18

Question 19

Provide an example of POST to submit HTML form data to a server side script

Answer 19

Question 20

How is POST used to send any data (not just form data)?

Answer 20

Question 21

In general, how do you use telnet to help understand HTTP?

Answer 21

Question 22

If we are dealing with static content, what are the key roles of web server and browser?

Answer 22

Question 23

What is the basic processing order at the HTTP client and server?

Answer 23

Question 24

What are the key roles of the browser and server when using HTTP and HTML to build a distributed application?

Answer 24

Question 25

What is the root of dynamic content generation?

Answer 25

Question 26

What is the browser’s role in basic web apps?

Answer 26

Question 27

What is the server’s role in basic web apps?

Answer 27

Question 28

What are the components that a web app consists of

Answer 28

Question 29

How does a general form page begin (the specific HTML)

Answer 29

Question 30

What might the corresponding perl script look like for a form submission?

Answer 30

Question 31

What is the general DOM structure?

Answer 31

The hierarchical structure is determined by the server and provided by the browser.

The DOM provides a basis for manipulation of the HTML document by the browser.

Question 32

What provides the heirarchical structure of the dom.

How does it relate to the brower?

Answer 32

Question 33

In the DOM model, what are the objects?

Answer 33

Question 34

How do DOM methods, properites and events work?

Answer 34