To redirect a client to another resource, the HTTP servlet uses the __________ method.

  • forward()
  • redirect()
  • sendRedirect()
  • transfer()
The sendRedirect() method in an HTTP servlet is used to redirect the client to another resource, typically specified by a URL.

Which listener interface allows you to gather statistics about session usage in your web application?

  • HttpSessionAttributeListener
  • HttpSessionListener
  • ServletContextAttributeListener
  • ServletRequestAttributeListener
The HttpSessionListener interface allows you to gather statistics about session usage in your web application by tracking session creation and destruction events.

How does ServletRequestAttributeListener differ from ServletRequestListener in its functionality?

  • ServletRequestAttributeListener is triggered only when attributes are added to the request.
  • ServletRequestAttributeListener is triggered when attributes are added, removed, or replaced in the request scope.
  • ServletRequestListener is triggered only when the request is dispatched.
  • ServletRequestListener is triggered when a request is initialized or destroyed.
ServletRequestAttributeListener is specifically designed to listen for changes in request attributes, whereas ServletRequestListener focuses on the initialization and destruction of the request.

The _________ listener is invoked when an attribute is added, removed, or replaced in a session.

  • HttpSessionAttribute
  • HttpSessionBinding
  • HttpSessionEvent
  • SessionAttributeListener
The HttpSessionBinding listener is invoked when an attribute is added, removed, or replaced in a session.

To respond to events like the initialization or destruction of the ServletContext, use the _________ listener.

  • ContextInitializationListener
  • ServletConfigListener
  • ServletContextEvent
  • ServletContextListener
Use the ServletContextListener to respond to events like the initialization or destruction of the ServletContext.

The __________ listener is useful for monitoring changes in request attributes during the lifespan of a request.

  • RequestAttribute
  • RequestAttributeChange
  • ServletRequestAttribute
  • ServletRequestAttributeListener
The ServletRequestAttributeListener is useful for monitoring changes in request attributes during the lifespan of a request.

In a web application tracking user login and logout, which listeners would be most effective?

  • HttpSessionAttributeListener
  • HttpSessionListener
  • ServletContextListener
  • ServletRequestListener
The HttpSessionListener is most effective for tracking user login and logout in a web application as it provides notifications about session creation and destruction.

If an application needs to clean up resources when the application is shut down, which listener should be used?

  • HttpSessionListener
  • ServletContextAttributeListener
  • ServletContextListener
  • ServletRequestListener
The ServletContextListener is used to perform actions during the initialization and destruction of the web application, making it suitable for cleaning up resources on application shutdown.

For an e-commerce application that needs to track user session activity and attribute changes, what combination of listeners would be ideal?

  • HttpSessionAttributeListener
  • HttpSessionListener
  • ServletContextListener
  • ServletRequestListener
The ideal combination for tracking user session activity and attribute changes in an e-commerce application is to use HttpSessionListener and HttpSessionAttributeListener together.

What is the primary purpose of using filters in web applications?

  • To handle HTTP requests and responses
  • To manage session information
  • To perform tasks before or after the request is handled by a servlet
  • To store data in the client's browser
The primary purpose of using filters in web applications is to perform tasks before or after the request is handled by a servlet, allowing for common processing tasks to be centralized.