Which three are true about the HttpServletRequestWrapper class?

[sam liya]

this is a question that i get from our tution class.Can anyone tell me the answers for this?

Which three are true about the HttpServletRequestWrapper class? (Choose
three.)
A. The HttpServletRequestWrapper is an example of the Decorator pattern.
B. The HttpServletRequestWrapper can be used to extend the functionality of a servlet request.
C. A subclass of HttpServletRequestWrapper CANNOT modify the behavior of the getReader method.
D. An HttpServletRequestWrapper may be used only by a class implementing the javax.servlet.Filter interface.
E. An HttpServletRequestWrapper CANNOT be used on the request passed to the RequestDispatcher.include
method.
F. An HttpServletRequestWrapper may modify the header of a request within an object implementing the
javax.servlet.Filter interface

[Christophe Verré]

The ranch is not a place to get straight answers for your homework. Please do your own homework.

[Vaib Gupta]

I hope I'm not disturbing the norm here but I wish to reply to Aruna's post. I can only think of 1 and 2 as the correct answers. Please PM me for 3rd answer.