Hi aspirant,

BITSAT is the entrance test conducted for admission into BITS colleges namely BITS Pilani, BITS Goa and BITS Hyderabad.

If your ultimate aim is to Join BITS then you should prepare first for this. You should give first priority to your BITS preparation.

Additionally, more or less the syllabus of other entrance examinations like JEE and other is same. So you can put attention on that too.

Wish you all the best.