Dear Jyoti, CS is one of the professional courses in demand. If you can set realistic goals and preparation schedule, it is easy to crack the exam in first attempt. My brother is a CA. As a kid he was never serious about studies, Once he joined CA, his level of commitment took a 180 degree turn. He cleared all his exams in the first attempt. He is a successful CA today. It is just the same with everyone of us. You have it in you. All you need to unleash your inner strength and focus. You will make it.