Hello There,

Hope you are doing good.

Look , CET is stands for Common Entrance Test , It is not just about JEE Mains .

Most of the Universities conduct their Common Entrance examination for providing admission in respective course.

There Eligibility , mode of Entrance exam are also differs, for instance most of the universities take pen , paper mode and few prefers computer based entrance exam.

Taking about JEE Mains this is National Level Exam conducted for candidates who wanted to pursue there degree in Engineering Field or different fields in B Tech.

May be I have cleared your doubt.

Hope this Information will help.

Thank you :)