I think not
A couple of legal cases recently ended in tears when executors of wills failed to get access to accounts.
The FBI can do it - as can other legal agencies (with the suitable warrants)
the Idea of a secret question is - that the answer is one you won't forget ... mother's name ... place of birth
I use a prog called infosafe
(roboform is also good)
to keep a record of all my passwords - it's encrypted .... and the only password I need remember.
bit late now ...
there are progs which will reveal password histories (google ELCOM) ... but they are not free