Many students take lateral entry into B.Tech from a diploma to advance their higher education and a better scope for career. Most Indian and foreign universities allow lateral entry, through which the candidate can join a B.Tech program in any related field directly from the second year. LEET (Lateral Entry Entrance Test) and some state-specific entrance exams help in this transfer. It depends on the diploma discipline, the criteria of the institution, and the marks you have gained during your diploma.
For aerospace or aeronautical engineering, if your diploma is in that field (like mechanical or aerospace-related diplomas), you can opt for B.Tech in ECE. This route enables you to grow from your past technical background and achieve greater knowledge in the subject, opening access to greater careers in the field of aircraft and spacecraft research, design, and development. Since you are admitted through lateral entry, you save a year but acquire a higher qualification that gives you an added advantage in such industries as aviation, space exploration, and defense technology. Do proper research about the specific requirements of the university you wish to attend before you apply.