What happens if a filter in the filter chain does not call the doFilter() method?
- An exception is thrown
- The filter chain continues processing without the filter
- The request processing stops
- The response is sent to the client directly
If a filter does not call the doFilter() method, the request processing stops, and the subsequent filters in the chain and the servlet are not invoked.
How does filter ordering affect the processing of requests and responses in a servlet application?
- Filter ordering has no impact on processing
- Filters are always processed in a random order
- Filters are processed in the order they are declared
- Filters are processed in the reverse order they are declared
Filter ordering affects the processing of requests and responses in a servlet application. They are processed in the reverse order they are declared in the deployment descriptor, affecting the sequence of their execution.
In the filter chain, the __________ method is used to perform the actual filtering.
- doFilter()
- filterRequest()
- initFilter()
- processFilter()
In the filter chain, the doFilter() method is used to perform the actual filtering of requests and responses.
When implementing a filter, it's critical to maintain the correct order of processing by calling __________ in the doFilter method.
- doProcessing.filter()
- filterChain.doFilter()
- filterOrder.doFilter()
- servletRequest.process()
In the doFilter method of a filter, it's important to call filterChain.doFilter() to ensure the correct order of processing continues.
What is the primary purpose of a filter chain in a servlet environment?
- To establish a secure connection
- To execute servlets sequentially
- To handle exceptions in a servlet
- To perform multiple filters on a request and response
The primary purpose of a filter chain is to allow multiple filters to be applied to a request and response in a sequential order, enabling the execution of various processing tasks.
How does a filter pass the request and response to the next entity in the filter chain?
- Automatically passed by the servlet container
- By directly calling the next filter
- By setting a flag in the request
- Using the chain.doFilter() method
A filter passes the request and response to the next entity in the filter chain using the chain.doFilter() method, which allows the request and response to move to the next filter or servlet in the chain.
Which method is used to initialize a filter in the filter chain?
- init()
- initFilter()
- initialize()
- initializeFilter()
The init() method is used to initialize a filter in the filter chain. This method is called by the servlet container when the filter is first created.
What is the first method called in the lifecycle of a servlet?
- destroy()
- doGet()
- init()
- service()
The init() method is called when a servlet is first loaded into memory and is used for initialization purposes.
The __________ method is called by the web container to indicate that a filter is being taken out of service.
- destroy()
- dispose()
- remove()
- unregister()
The destroy() method is called by the web container to indicate that a filter is being taken out of service.
The __________ object provides the filter with information about its initialization parameters.
- FilterConfig
- FilterContext
- InitParams
- ServletContext
The FilterConfig object provides the filter with information about its initialization parameters, allowing the filter to retrieve its configuration.