As guided you in your previous query, Once you clear management exam then you will be required to choose your specialization.

So exams like CAT, MAT, XAT, CMAT exams you will have to clear first.

Also in CAT exams, or any other management exams you won't be asked for operations management as this is a thing you will choose later.

So CAT syllabus has mainly 3sections and total 100 questions.
There is no negative marking in CAT exam.

The exam pattern and CAT syllabus you can check completely here.

Good luck.