This book is meant for UGC-CSIR NET/SET, GATE, etc. and also useful for other national and state level entrance examinations. The book covers complete text material exactly as the latest pattern. Every chapter contains study aids, typical solved problems, sufficient number of multiple choice questions, matching questions, short answer questions with answers and complete solutions / hints. At the end of the book previous years, GATE examination questions are given with solutions. The book will also be useful for B.Sc. and B.Tech. students. SALIENT FEATURES : 1. Complete and exhaustive text material exactly as per the latest UGC-CSIR NET/SET, GATE. 2. Every chapter contains good number of typical solved problems, sufficient number of multiple choice questions with answers and solutions, matching questions and short answer questions. 3. At the end of the book, previous years GATE examinations questions are given with complete solutions. 4. The book is useful for B.Sc., B.Tech. students and also for national and state level entrance examinations. 5. The book is quite useful for interviews for the post of Assistant Professor, Lecturer, etc.