To avoid exam stress always believe in action. Thinking without action will increase your stress and adversely affect your positivity.
Always make provision for a small break during long study sessions to rejuvenate your energy and strength.
Slight nervousness is perfectly fine and inevitable during exam time. But excessive stress can be very harmful and block your thinking process. So just be careful.
Last but certainly not the least to avoid exam stress or any kind of stress in life it is very important to have faith in your abilities and efforts. Remember nobody is perfect so always ready to improve yourself. Even in CA final, first rank holder has got just 58%. Failure in CA exams does not mean that it is the end of the life. Try again and reach your goal. Don’t forget it is a professional examination and it is so common to fail in exams. But this should not be an excuse always. Always try your best with utmost sincerity and dedication. I am sure success will follow you. Also give due regards to the expectations of your parents and also remember with their blessings you can deal with any sort of pressure situation.