what does the term web container means exactly?please also give some examples
In Java Platform, Enterprise Edition specification, servlet container comes into picture. It is also know as web container, which is used to deploy and execute the servelet and JSP. Example of web container or servlet container is Tomcat, Jetty etc.
A Web application runs within a Web container of a Web server. The Web container provides the runtime environment through components that provide naming context and life cycle management. It manages the execution of JSP page and Servlet components for the web applications.