You can choose either of the field as per your interest for the JKSSB examination and in general you will not face much of a problem in cracking them if your preparation is good. So it doesn't matter which stream you choose what matters is your preparation of the examination.

Now as you have mentioned that you need a job just after graduation, then I would recommend you to go for the BCOM course because, after BCOM lets say if for some reason you can't score well in JKSSB then also you will be able to join the private companies as Accountant. So if you go for BCOM you will have a multiple way around you.

For more information regarding BCOM consider the link below:

https://www.careers360.com/courses/b-com-bachelor-of-commerce

I hope this helps. Wish you a great afternoon!