I have more experience in servlets & jsp techs..( nearly 5 years...)
and have been preparing for last 3 months( although not continuosly , but whenever got time...)..
anyhow experience is nothing to do with exam, it's enough if one goes through what i have mentioned in the post...
link for mikalai zaikin study guide
http://java.boot.by/wcd-guide/ all the best...