To improvise the JEE score, students need to practise as many questions from the JEE Main Previous Year Question Paper. By practising each question included in the JEE PYQ, aspirants can easily know their skills and flaws for all chapters and subjects. Before exercising questions, candidates need to complete the JEE syllabus in a proper and accurate way.
Source: https://www.selfstudys.com/books/jee-previous-year-paper