Hello student as per the marking scheme yes for service sector examination yes there's negative marking the marking scheme is as mentioned below -

1) for every correct answer - +4 Marks (Plus 4)

2)for every incorrect answer - -1marks (Minus 1)

For more details refer to the link mentioned below - https://www.google.com/amp/s/hospitality.careers360.com/articles/nchmct-jee-exam-pattern/amp

Feel free to comment if you've any doubt

Good luck