What built-in objects does JSP have? What are their roles?

Request indicates the httpservletrequest object. It contains information about browser requests and provides several useful methods for obtaining cookie, header, and session data.
Response indicates the httpservletresponse object, and provides several methods (such as cookies and header information) for setting the response sent back to the browser.
The out object is an instance of javax. jsp. jspwriter. It provides several methods for sending output results to the browser.
Pagecontext indicates a javax. servlet. jsp. pagecontext object. The attributes of a Web page. It is used to conveniently access the namespaces of various scopes and APIs of servlet-related objects. It also encapsulates common servlet-related functions.
Session indicates the javax. servlet. http. httpsession object of a request. Session can store user status information
Applicaton indicates a javax. servle. servletcontext object. This helps you find information about the servlet engine and Servlet environment. Content being executed by Servlet
Config indicates a javax. servlet. servletconfig object. This object is used to access the initialization parameters of the servlet instance.
The page JSP page itself indicates a servlet instance generated from the page

Exception for the error webpage, exceptions not captured