Hi Rahul,

CET is a common entrance exam. You do not have to write CET for any diploma courses.

A candidate must have pursued his/her 10th or 12th from a recognized board. The minimum criteria varies from college to college but in general you should have scored minimum 55% marks. You can directly fill the application form for the college.

After the diploma course you can take a lateral entry in some good engineering college or you can continue with your job.

HOPE THIS HELPS

ALL THE BEST