what is the difference between servlet config and servlet context?

Answer 1

Servletconfig specified for a particular servlet and unknown to other servlets in application. ServletContext specified for an entire application outside of any particular servlet and available to all servlets within that application.

Answer 2

sergey.....if there are two servlet...if i want to use servlet config for one servlet...
how web.xml will understand which servlet has used config

Answer 3

You can pass parameters to a servlet from web.xml. Example code:
<servlet>
<servlet-name>yourServletName</servlet-name>
<servlet-class>your.package.ServletClass</servlet-class>
<init-param>
<param-name>paramName</param-name>
<param-value>value<param-value>
</init-param>