Andy Dingley wrote:
> weekend256@y... (Weekend) wrote in message news:<34e5949a.0406301638.1242d5ae@p...>...
> 
>>Currently, i want to develope a multiple choice exam website. 
>>The content of the test is store in an XML file. 
> 
> XML isn't a database.  
> Store one test in a single XML file if you want. 
> Don't store all your tests in the same XML file. 
> Don't write all your results into a single XML file.
>

Exactly

> 
>>Could you tell me which programming language should i use?
> 
> Anything you know how to write and can get hosted.  
> On Windows, use IIS / ASP / JScript / XSLT
> On small Unix systems, use PHP / XSLT
> On large Unix systems, use (JSP | Java Servlets) / XSLT
> 

Or have a look at Cocoon (http://cocoon.apache.org):

   Apache Cocoon is a web development framework built
   around the concepts of separation of concerns and
   component-based web development.

   Cocoon implements these concepts around the notion
   of 'component pipelines', each component on the
   pipeline specializing on a particular operation.
   This makes it possible to use a Lego(tm)-like approach
   in building web solutions, hooking together components
   into pipelines without any required programming.

Since it is Java based it should run on any operating
system supporting this.

HTH,
Gerald