4.JSP total of the following nine built-in objects

request the client request, the request will be included from the GET / POST request parameter
response page returned to the client's response
properties pageContext page is where management
session with the request for a session of related
content application servlet is executing
out for transmitting responses output
config servlet framework member
page JSP page itself
exception for an error page, uncaught exception

request represents the HttpServletRequest object. It contains information about the browser request, and provides a useful way to get a few cookie, header, and session data.
HttpServletResponse object represents a response, and provides a method (e.g., as cookies, header information, etc.) for setting the number back to the browser in response to the
out object is an instance of javax.jsp.JspWriter, and provides several ways to make you used to send output back to the browser.
pageContext represents a javax.servlet.jsp.PageContext object. It is used to facilitate access to a diverse range of name space, the API associated servlet object, and a common packaging
methods servlet related functions.
represents javax.servlet.http.HttpSession session object requested. Session state information of the user can store
applicaton represents a javax.servle.ServletContext object. This helps to find information about the servlet engine and servlet environment
config represents a javax.servlet.ServletConfig object. This object is used to access the servlet instance initialization parameters.
It represents a page from the servlet instance generated page

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