Hey Ayesha!

Thats very mindful of you that you are considering these points in your mind before the exam .  And following are the guidelines about time of commencement of examination:

For morning shift an applicant should report at the exam venue by 08.00 am. Entry to examination centre closes at 09:15 am. Entry will not be permitted beyond 09:15 am. The exam will begin at 10:00 p.m.And  the applicant is not allowed to leave the examination hall before 12:30 p.m.

    For afternoon shift candidates should report at the exam venue by 01.00 pm. Entry to examination centre closes at 02:15 pm. Entry will not be permitted beyond 02:15 pm. Exam will begin at 03:00 pm.Candidate is not allowed to leave the examination hall before 5:30 p.m.

To know all the guidelines about JIPMER entrance exam, do follow the given link :

https://medicine.careers360.com/articles/jipmer-mbbs-exam-day-guideline

Hope it helps!