Hi Madhur,
The URL to use depends on how you have configured your Web Server/Servlet Engine -- which you failed to mention (or if you did, then I missed it -- sorry).
I'll assume that you are using
Tomcat as your servlet engine -- since it is the most popular (I believe) and is also the reference implementation for the servlet specification (from SUN Microsystems).
If that is the case, then I'll have to disappoint you again -- because I don't use Tomcat.
With the servlet engine that I use, there is a configuration file where you map the URL's to actual directories, so using your example, I'd have to map "C:\Servlets" to some URL and then I'd use that URL to access my servlet.
I don't know how much you know about servlets (or where you got your knowledge from), but I learned about servlets from the book "Java Servlet Programming" by Jason Hunter (with William Crawford) and I highly recommend it. The book's companion web site is:
http://www.servlets.com And you can read the book online at the "Safari" online library:
http://safari.informit.com They are offering a free, two-week trial subscription.
Hope this has helped you.
Good Luck,
Avi.