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Session management can be achieved by the use of −

    Cookies − A webserver can assign a unique session ID as a cookie to each web client and for subsequent requests from the client they can be recognized using the received cookie.

    Hidden Form Fields − A web server can send a hidden HTML form field along with a unique session ID as follows −

<input type = "hidden" name = "sessionid" value = "12345">

    This implies that when the form is submitted, the specified name and value will be getting included in GET or POST method.

    URL Rewriting − In URL rewriting some extra information is added on the end of each URL that identifies the session. This URL rewriting can be useful where a cookie is disabled.

    The session Object − JSP makes use of servlet provided HttpSession Interface which provides a way to identify a user across more than one page request or visit to a Web site and to store information about that user.
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Java Interview Questions and Answers 2018