What is the best practice for handling sensitive data in servlet log files?
- Disable logging of sensitive data
- Encrypt log files
- Obfuscate sensitive information before logging
- Use a secure logging framework
The best practice for handling sensitive data in servlet log files is to obfuscate the information before logging. This ensures that sensitive details are not exposed in logs, maintaining security and compliance with data protection regulations.
The ________ method of the HttpServletResponse object is used to send an error response to the client with a status code and a descriptive message.
- errorResponse()
- sendError()
- sendResponse()
- writeError()
The sendError() method of the HttpServletResponse object is used to send an error response to the client with a specified status code and a descriptive message.
In servlets, the _________ framework can be used for advanced error handling and logging.
- ErrorLog
- ExceptionHandling
- Filter
- Log4j
In servlets, the Log4j framework can be used for advanced error handling and logging. Log4j provides a flexible logging framework for Java applications.
Custom error pages in servlets are configured in the _________ file.
- config.xml
- custom-error.xml
- error-pages.xml
- web.xml
Custom error pages in servlets are configured in the web.xml file. This file allows you to specify error pages for different HTTP status codes, providing custom error handling in your web application.
Servlets can use the _________ interface to log application-level events.
- EventLog
- LogInterface
- Logging
- ServletLog
Servlets can use the Logging interface to log application-level events, providing a standardized way to record various log messages.
The ___________ method is often used to log debugging information in servlets.
- debug()
- debugLog()
- log()
- logDebug()
The log() method is often used to log debugging information in servlets, allowing developers to record messages of various levels, including debugging information.
The use of ___________ in error messages helps in identifying the exact source of an error in servlets.
- error codes
- error details
- stack traces
- timestamps
The use of stack traces in error messages helps in identifying the exact source of an error in servlets, providing detailed information about the error's origin.
A servlet needs to log different levels of messages. Which approach is the most effective?
- Print messages to the console
- Use System.out.println()
- Use a logging framework like Log4j
- Write messages to a file
Using a logging framework like Log4j is the most effective approach for logging in a servlet as it provides flexibility, configurability, and allows logging at different levels.
How can a servlet invalidate a cookie that has been sent to the client?
- By calling response.expireCookie()
- By setting the cookie to null
- By setting the cookie's Max-Age to 0
- By using request.removeCookie()
A servlet can invalidate a cookie by setting its Max-Age attribute to 0, indicating that the cookie has expired, and the client should discard it.
Describe the steps for setting up a custom error page for a specific type of exception in a servlet application.
- Define an error page in the servlet code
- Include a try-catch block in the servlet
- Redirect to a generic error page
- Use the
element in web.xml
To set up a custom error page for a specific type of exception in a servlet application, use the element in the web.xml file, specifying the exception type and the corresponding error page. This approach allows for centralized error handling and presentation.