Hey Meera ,
Greetings!

Delhi University does not conduct any entrance exam for graduation courses like B.A. , B.COM. or B.SC. Admission to these courses are carried out on the basis of your class 12 score .
However , there are few professional courses for that DU conducts entrance exams like : BMS , B.EL.ED , etc.

Kindly check the detailed list of undergraduate courses by clicking on the links mentioned here below :-
http://www.du.ac.in/du/index.php?page=old-undergraduate-courses

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Hope this will help . Good Luck ! You can reply to this comment if you have any further queries , I will be happy to help .