dear radishkumar!! what i would suggest u is: when u go for an interview dont think of how u need to speak, but focus on what u need to speak. If you fear in an interview, you are not going to be selected anyway. So, why think of fear when you know that it will affect your interview. I would recommend you to not to think of english while giving your interview.
And you can only do this if you practice speaking in english. Join voice based bpo for an example.
