In educational and professional context, testing the ability of a student or future practitioner is called examination. There are many types of examinations according to their structure, subject, difficulty etc. Some important competitive examinations have been highlighted in the presented book. Examinations are an essential part of the present education system. It is an important tool to measure the ability of the student. Examinations are very useful to check the ability of a student. Through examination, the quality of students in the concerned subject can be assessed accurately to a great extent. The future of students depends a lot on how they perform in the examinations. Help has been taken from many written and unwritten sources in the book. I express my gratitude to all those knowledgeable authors and also hope that the book will be useful for the readers.