Engineering entrance exams in India are conducted annually for undergraduate admissions at both all-India and state levels, allowing students to take multiple exams. Key exams include JEE Main, JEE Advanced, and various state-specific tests, along with a list of top engineering colleges such as IIT Madras and IIT Bombay. The document also outlines several engineering branches and their career focus, spanning areas like aerospace, automotive, civil, and software engineering.