Dear Madan,
I got this advice too at the cattle-drive.
The JDBC-assignment is running fine using the orion-server, where the classes are indeed in the directory correspondent what you said.
Copying my 'greetings' file to ROOT, works.
(creating WEB-INF/classes/) and copying the Servlet-class-files (called by /servlet/"serveletname") gives a fine errormessage:
The requested resource is not available.
This is/was the reason of my question.
So tomcat somewhere 'must' be told that the servelets in "tomcat"/webabs/ROOT/WEB-INF/classes/*.class
should be found e.g. from a WELCOME.HTML
<form name="form" method="post" action="/servlet/VideoLoginServlet">
Password:<br>
<input type="password" name="password" value="">
<input type="submit" value="Login">
</form>
I have not found it yet.
By the way, I am talking about tomcat gotton by installing jwsdp-1_0_01.