hello aspirant,

i don't think that there are seperate exams that will help you to improve your skills in the field, but the course requires students that have

mathematical, analytical and problem-solving skills. candidates should also have the ability to work under pressure to meet deadlines so, to improve your skills , you can try to solve various question papers or sample papers that can help you improve, you can also try solving PROBLEM SOLVING ASSESMENT, which can help you as well.

hope that helps

all the best

Good Luck!