Dear Akhil, 

If you mean to ask if you can appear for DU JAT more than once in different years, then the answer is yes. So for instance, if you appeared for DU JAT in 2018, you can also appear for it in 2018. However, if you mean that if you can give an attempt at DU JAT more than one time in one year only, like in different shifts, then no. You cannot do that. You will have to appear for the exam as per the date and time as reflected in the admit card. 

Furthermore, I would like to apprise you that DU JAT is an undergraduate level exam taken for BMS, BBA, BA Business Economics Honours subjects. Since your profile reflects you are interested in MBA, please pay a little more attention to this fact. 

Hope it helps.

Good Luck!