how easily to crack UPEES exam ?

Instead of choosing a random topic from the syllabus, you must break your preparation into sections. Sub-topics from each section should be selected and then strategy on clearing concepts must be made. Never leave any concepts doubtful or unsolved. Prepare notes and go through them on a daily basis. Having small notes is one of the easiest ways to do revision anytime and anywhere. Once done with the syllabus and concept clarity, you should move towards solving previous years papers. Give mock tests as much as possible. Time management is one more important thing you should look upon. Remember that practise will increase your efficiency. NCERTs are the best books. Also you can study Class XI & XII board textbooks. You can solve UPSEE Sample papers. Solving these papers will help you to understand which type of questions usually come.
http://engineering.careers360.com/articles/upsee-sample-papers
http://engineering.careers360.com/articles/upsee-answer-key