question about HttpSessionBindingListener interface

[jeffrey z. lee]

Which statements are correct about object implementing Which statements are correct about object implementing HttpSessionBindingListener interface?
1) valueBound method will be called before the object is accessible through getAttribute method
2) valueBound method will be called after the object is accessible through getAttribute method
3) valueUnbound method will be called before the object is removed from the session
4) valueUnbound method will be called after the object is removed from the session

[Raj Paul]

1 & 4 are the answer

[jeffrey z. lee]

I don't know why answer 1 is correct.
when the object with the implementation of HttpSessionBindingListener is being bound to a session,the valueBound method of the object is called .why is valueBound method called when the object is accessed ?
please help me, thanks

[Raj Paul]

Please see the phrase
valueBound method will be called before the object is accessible through getAttribute method
valueBound method will be called, before the getAttribute method.. The sequence has been said here.