What is the primary purpose of the POST method in HTTP?
- To delete data
- To request data
- To retrieve data
- To send data
The primary purpose of the POST method in HTTP is to send data to the server, typically used for submitting form data and other complex data types.
The sequence of method calls for a servlet put into service is __________, __________, and then __________.
- destroy(), init(), service()
- init(), destroy(), service()
- init(), service(), destroy()
- service(), init(), destroy()
The sequence of method calls for a servlet put into service is init(), service(), and then destroy().
The __________ attribute of the session object is used to store objects.
- getObject()
- saveAttribute()
- setAttribute()
- storeObject()
The setAttribute() method of the session object is used to store objects in the session.
What are the implications of disabling cookies for session tracking?
- Enhanced security
- Improved performance
- Increased server load
- Loss of session state
Disabling cookies for session tracking may result in the loss of session state, as cookies are commonly used to store session identifiers. This can impact the continuity of user sessions.
To send a large amount of data in a request, the _______ method is preferred.
- DELETE
- GET
- POST
- PUT
To send a large amount of data in a request, the POST method is preferred as it allows for sending data in the request body.
How does the servlet differ from JSP in terms of performance optimization?
- Both have similar performance
- JSPs are typically faster
- Performance depends on the specific use case
- Servlets are typically faster
Servlets are generally considered faster than JSPs as they involve less overhead. JSPs, being text-based, may have a slight performance cost due to the need for parsing and translation into servlets during the initial request.
The method __________ is used when the servlet needs to redirect the client to a different domain.
- forwardResponse
- redirectToDomain
- sendForward
- sendRedirect
The method sendRedirect is used when the servlet needs to redirect the client to a different domain.
ServletContext is used for sharing information between:
- Browser and Server
- Client and Server
- JSP and Servlet
- Web components
ServletContext is used for sharing information between web components within the same web application, like servlets, JSP pages, and other resources.
A web application needs to remember user preferences across sessions. Which approach using cookies is most suitable?
- HttpOnly Cookies
- Persistent Cookies
- Secure Cookies
- Session Cookies
Persistent Cookies are suitable for remembering user preferences across sessions as they persist even after the user closes the browser.
Can a servlet's destroy() method be overridden? If yes, what should be considered?
- It depends on the servlet container being used.
- No, the destroy() method cannot be overridden.
- Yes, but it is not advisable to override it.
- Yes, it can be overridden, and it is recommended to do so.
Yes, a servlet's destroy() method can be overridden, but it is recommended to do so carefully, ensuring that necessary cleanup operations are performed. Considerations should be given to resource release and proper handling of exceptions in the overridden method.
Which method is used to send an error status code along with a custom message in the response header?
- sendError()
- sendStatusCode()
- setErrorCode()
- setErrorMessage()
The sendError() method is used to send an error status code along with a custom message in the response header.
Servlet initialization parameters are primarily used for ___________ configuration.
- application
- deployment
- environment
- runtime
Servlet initialization parameters are primarily used for application configuration.