_________ is used to monitor lifecycle events of a session.
- EventListener
- HttpSessionListener
- ServletContextListener
- ServletRequestListener
The correct answer is HttpSessionListener. This interface is used to monitor lifecycle events of a session, such as when a session is created, destroyed, or its attributes are modified.
The __________ interface allows objects to be notified of changes in session lifecycle.
- HttpSessionActivationListener
- HttpSessionAttributeListener
- HttpSessionBindingListener
- HttpSessionListener
The HttpSessionListener interface allows objects to be notified of changes in the session lifecycle, such as session creation, attribute addition, and session invalidation.
To listen for events related to a specific attribute in a session, implement the interface ___________.
- HttpSessionActivationListener
- HttpSessionAttributeListener
- HttpSessionBindingListener
- HttpSessionListener
To listen for events related to a specific attribute in a session, implement the HttpSessionAttributeListener interface. This allows tracking changes to attributes within the session.
When a servlet context is initialized or destroyed, the ___________ interface is used.
- ServletContextAttributeEvent
- ServletContextAttributeListener
- ServletContextEvent
- ServletContextListener
The ServletContextListener interface is used when a servlet context is initialized or destroyed, providing methods for handling these lifecycle events.
When a new attribute is added to the session, which listener interfaces are invoked?
- HttpSessionActivationListener
- HttpSessionAttributeListener
- HttpSessionBindingListener
- HttpSessionEvent
The HttpSessionAttributeListener interface is invoked when a new attribute is added to the session. This allows you to perform actions when attributes are added, removed, or replaced in a session.
Identify the listener interface that would be used to log session creation and destruction.
- HttpSessionActivationListener
- HttpSessionBindingListener
- HttpSessionEvent
- HttpSessionListener
The HttpSessionListener interface is used to log session creation and destruction events. This allows you to perform actions when sessions are created or destroyed in a web application.
In a web application, you need to audit changes to session attributes. Which listener would you implement?
- HttpSessionAttributeListener
- HttpSessionBindingListener
- HttpSessionEvent
- HttpSessionListener
The HttpSessionAttributeListener interface is used to audit changes to session attributes. This allows you to perform actions when attributes are added, removed, or replaced in a session.
What is the purpose of the FilterConfig object in Servlet filters?
- To define filter order.
- To hold configuration parameters for a filter.
- To process HTTP requests.
- To store filter mappings.
The FilterConfig object is used to hold configuration parameters for a filter, allowing the filter to be customized without modifying the filter code itself.
How do you specify the URL patterns to which a filter should apply?
- By modifying the servlet code.
- In the filter's constructor.
- In the web server settings.
- Using the
URL patterns to which a filter should apply are specified using the element inside the element in the web.xml file. This defines the URLs that the filter will intercept.
How does the servlet container use the order of filter mappings in web.xml?
- Filters are executed based on the order of their registration in the servlet container
- Filters are executed based on the order specified in web.xml
- Filters are executed in alphabetical order
- Filters are executed in random order
The servlet container uses the order of filter mappings in web.xml to determine the sequence in which filters are executed. Filters are executed based on the order specified in web.xml.