Hii Arul. J!
To write answers in your exam just keep some key points in your mind i. e-
1. Read all questions carefully
2. Manage your time, do not give more time in one question and less time to another. You have to manage.
3. Structure your answer. Don't jump to write your answer after reading the questions, take few minutes to structured your answers.
4. Review your answers thoroughly. Some students gave their answers after completing but it's not good re- read your answer again so if you had done any mistakes you can correct it.
I hope this tips will help you.