If you are well prepared with your Graduation syllabus then it will help you to crack the exam, You can also check the Entrance Syllabus of Delhi university with the given below link.

http://www.du.ac.in/du/uploads/Admissions/01062018_MA_Hindi.PDF

You can also check the previous year papers to know about the question paper level and accordingly you can start your preparation.

There is no need hard & strict rule for the preparation, with little hard work on the given syllabus with the above given link, You can clear it.

Good Luck!