Twenty complete mock papers for ICSE Computer Applications (861), Class X, written for the 2027 examination at the level of the recent board papers. Each paper follows the board pattern: 100 marks, 2 hours, Section A with 20 multiple-choice questions and short answers, and Section B with six Java programs of which four are to be answered. Every answer is explained step by step, with output tracing for expressions and loops and complete, tested Java programs with sample input and output. A chapter on the ICSE papers from 2017 to 2026 shows how often each topic is asked. All questions are original, written for this book. Free sampler and PDF edition at codewithvinay.com. Independent practice papers, not affiliated with or endorsed by CISCE.