Hello Aryan

There is separate admission procedure for students from states other than Tamil Nadu(TN). There will be an open advertisement in newspapers (may be not all over India)or you can constantly check the Anna University website Home - Anna University where the admission notices start to display from March/April for the consequent year.

You can apply online through the web portals once they are made available.

Selection is mainly through single-window counselling system based on your High school(i.e. 12th or or junior clg according to your state)marks when studying under 10+2 system in India. They see your PCM mark aggregate(generally called CUT-OFF mark in TN) out of 200 with having

Physics- 25%

Chemistry- 25% &

Math- 50%

They are ranked based upon the cut-off marks and called for counselling mostly at JULY based upon their ranks mostly through intimation in Website(may be mail). Around 150 seats reserved for other state Quota students distributed across CEG,MIT,ACT.

Based on merit and as per first come first serve basis they can choose their preferred course from the available at their time/slot of counselling.

Yea they can 

Visit Anna University website for  notifications related to it , and for more detailed information.

The cutoff is based on your pcm marks in class 12 .

Physics chemistry maths marks .

One has to have atleast above 98.5 percent to avail as there is high competition for less seats non local