A Junior friend of mine asked if he has to know anything about programming languages before entering the company. What I told him was that "If you want to do some courses it is really great, go and learn something in this free time.. they won't place you in your requested domain no matter how well versed you are in that subject.
dont waste your precious time waiting for a call . Go and learn some basic stuff and it will help you in your training indirectly..You are free now so try to enjoy the period(i know it is difficult), at the same time learn something...