How can a servlet determine if an incoming request supports asynchronous processing?
- canAsyncProcess()
- isAsyncRequest()
- isAsyncSupported()
- supportsAsync()
The isAsyncSupported() method is used by a servlet to determine if an incoming request supports asynchronous processing.
How does asynchronous processing in servlets improve server resource utilization?
- Increases server load
- Increases thread blocking
- No impact on thread blocking
- Reduces thread blocking
Asynchronous processing reduces thread blocking, allowing the server to handle more requests without waiting for each to complete, thus improving resource utilization.
What is the role of the AsyncListener in the servlet's asynchronous mode?
- Controlling servlet initialization
- Handling asynchronous errors
- Initiating asynchronous tasks
- Monitoring asynchronous operations
The AsyncListener plays a role in monitoring asynchronous operations, allowing developers to respond to events such as the start and completion of asynchronous tasks or handling errors in asynchronous processing.
How does asynchronous processing affect the servlet's lifecycle?
- Extends the servlet lifecycle
- No impact on the servlet lifecycle
- Pauses the servlet lifecycle
- Shortens the servlet lifecycle
Asynchronous processing can extend the servlet lifecycle, as it allows tasks to continue beyond the usual request-response cycle, providing more flexibility in handling long-running operations.
Which HTTP status code is typically sent by an HTTP servlet to indicate a successful response?
- 200 OK
- 302 Found
- 404 Not Found
- 500 Internal Server Error
The HTTP status code 200 OK is typically sent by an HTTP servlet to indicate a successful response. This status code signals that the request has been successfully processed, and the server is returning the requested resource.
To retrieve an AsyncContext object in a servlet, you use the __________ method of the HttpServletRequest.
- getAsyncContext()
- initAsync()
- retrieveAsync()
- startAsync()
To retrieve an AsyncContext object in a servlet, you use the getAsyncContext() method of the HttpServletRequest.
In asynchronous servlets, the __________ method of AsyncContext sends the response to the client.
- complete()
- finish()
- getResponseWriter()
- sendResponse()
In asynchronous servlets, the complete() method of AsyncContext is used to send the response to the client.
To add an AsyncListener to an AsyncContext, use the __________ method.
- addAsyncListener()
- addListener()
- attachListener()
- registerListener()
To add an AsyncListener to an AsyncContext, use the addAsyncListener() method.
The __________ method of AsyncContext allows for manually controlling the timeout of an asynchronous operation.
- adjustTimeout()
- controlTimeout()
- setAsyncTimeout()
- setTimeout()
The setAsyncTimeout() method of AsyncContext allows for manually controlling the timeout of an asynchronous operation.
Consider a servlet that initiates a long-running task asynchronously. What happens to the request thread during this task?
- The request thread is blocked until the asynchronous task completes.
- The request thread is free to handle other requests.
- The request thread is paused indefinitely.
- The request thread is terminated.
In an asynchronous operation, the request thread is freed to handle other requests while the long-running task proceeds independently.