This book has been prepared by the subject experts and a group of highly experienced faculties of GATE. As a result this book would serve as a one-stop solution for any GATE aspirant to crack the examination. GATE 2021 contains topic-wise 31 years solved papers. Extra care has been taken to present the content in a modular and systematic manner to facilitate easy understanding of all topics. Salient feature: Fully solved with explanations. Chapter-wise arrangement. Detailed analysis of past year