There is no entrance exam in TNEA. They consider 12th class marks.
In order to apply for TNEA counselling you must have nativity certificate and you must have 50% aggregate in 10+2 standard for other backward classes 40% is required.
To check complete eligibility criteria you can refer below link
https://engineering.careers360.com/articles/tnea-eligibility-criteria
For other state quota counselling is held seperately.
Good luck!!
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