JSP and Servlets Quiz

The HTTP 404 status code is the standard response indicating that the requested resource could not be found at the provided URL location. This is the most common error encountered when a page has been moved, deleted, or the URL was typed incorrectly.

JSP technology was specifically designed to process HTML form data as part of Java EE web application development. JSP pages can access form parameters through implicit objects like request.getParameter(), making form processing a core capability.

GenericServlet is a protocol-independent servlet class. It defines a lifecycle method service() called for all client requests. Unlike HttpServlet, it does not implement HTTP-specific behavior directly. The marked options correctly describe its protocol-neutral design and request handling workflow.

Once the HTTP response has been committed (headers sent and buffer flushed), the servlet container cannot modify the response to redirect or forward. Attempting to do so triggers an IllegalStateException with the message 'response already committed'. The other options refer to HTTP error codes or different exceptions entirely.

The java.net.URLConnection class is designed to establish and manage a connection to a resource at a specified URL. It represents the communication link and provides methods for reading from and writing to the resource, making the statement accurate.

JSP technology provides all four listed advantages: separation of dynamic/static content through its template mechanism, support for scripting and custom tag libraries, component/tag reuse through JavaBeans and custom tags, and serving as the presentation layer in N-tier enterprise architecture.

All four statements correctly describe application scope in JSP. Objects with application scope are accessible across the entire application (all requests/sessions), persist until the ServletContext is destroyed/reclaimed, can be accessed from non-session-aware pages, and are stored in the implicit application object.

The Cookie class in Java servlets/JSP uses setMaxAge(int seconds) to set the cookie's maximum age in seconds. The parameter must be an integer, not a float. Negative values delete the cookie, zero deletes it immediately, and positive values set the expiration time.

In JSP, only jspInit() and jspDestroy() can be overridden by developers. The _jspService() method is generated by the container and cannot be overridden (it's marked final in the generated servlet). getParameter() is a method of ServletRequest interface, not a JSP lifecycle method.

Applets can communicate with servlets using HTTP requests (sending text or serialized objects), direct TCP/IP sockets, or Remote Method Invocation (RMI). Since all three communication mechanisms are valid, marking them all as correct in this multiple-response question is accurate.

While JSP pages primarily use the JspWriter implicit object 'out', developers can explicitly access ServletOutputStream through response.getOutputStream() when binary output is needed. This is valid JSP/servlet API behavior, making the statement true.

The 'error-page' tag in web.xml is used to define error pages for JSP/servlet applications. It maps error codes or exception types to specific location URLs where error handling pages reside. The other options are sub-elements within error-page configuration, not the defining tag itself.