The topics are asked in the entrance exam of JNU MA HIstory:
General comprehension, A broad understanding of the social sciences and
Themes  related  to  political,  economic  and  social  history  and  on  aspects  of  religion  and  culture  pertaining  to  Indian  and  World  history  for  the  ancient,  medieval, modern and contemporary periods. (Students are free to answer questions from any period, irrespective of the stream they have applied for.

The paper will be subjective. You can check the complete information with the given below link.

https://admissions.jnu.ac.in/prospectus/jnuee/SSS%201.pdf

Good Luck!