This book has been developed by a group of faculties who are highly experienced in training GATE candidates and are also subject matter experts in their respective fields. The book is divided into three parts— covering (1) General Aptitude, (2) Engineering Mathematics and (3) Electronics and Communications Engineering'. Coverage is as per the syllabus prescribed for GATE and all topics are handled in a comprehensive manner —beginning from the basics and progressing in a step-by-step manner supported by ample number of solved and unsolved problems. Extra care has been taken to present the content in a modular and systematic manner, to facilitate easy understanding of all topics. So, this book would definitely serve as a one-stop solution for all GATE aspirants, preparing for upcoming examination.