1) We can give only 2 attempts after or while doing internship.
1st attempt during internship and next after it. After that we are not allowed to any further exams till we break our bond or finish a compulsary 1yr MO ship. Once we do this we can give n number of atempts after that.
Eg. 07 batch can give 1exam at 2013 and next at 2014 after which no attempts can be given untill we complete our MOship.
2) This will be applicable for only 50% of quota in Maha. Seats.
For more details read this:-
For any queries ask in comments.