Please be specific about your doubt and have clarity on what you you seek from here. It is not MDY, Rohatk and it is MDU, Rohtak i.e., Maharshi Dayanand Univeersity, Rohtak. Friend, to be very fair enough, you have time to post a query here online and seems you haven't put an effort to check the date of examination and model papers/previous question papers by just visiting their website: http://www.mdurohtak.ac.in/. Have a visit to the webpage and you can get more information than here.
Further, you were mentioning that the study mode is through distant education. Then the University would provide you all the study material and visit the registrar's office / the nearest study centre available to get full details.