HTTP Status 404 -/DemoServlet/

Hi i have created a project with name DemoServlet in eclipse .In the src folder of the project i have created a servlet LoginServ under com.bindu package.When i run it i am getting the 404 error as it is pointing to localhost:8080/DemoServlet/

I am using Eclipse Java EE IDE for Web Developers.

Version: Luna Service Release 1 (4.4.1) Build id: 20140925-1800

and Tomcat v8.0 server

Below is my web.xml for LoginServ

<servlet>
    <servlet-name>LoginServ</servlet-name>
    <servlet-class>com.bindu.LoginServ</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoginServ</servlet-name>
    <url-pattern>/LoginServ</url-pattern>
  </servlet-mapping>

By appending LoginServ next to DemoServlet/ is working.But i would like to know where i did mistake