Colleges in Gandhinagar

There are three ways through which you can get admission in DA. One through the AIR of JEE Mains or if you are a Gujarat domicile, you can get in through ACPC through GUJCET. In case you are an NRI, or anyone of your parents are NRI you can apply for admission through your SAT score. There are no other entrances conducted by the college for the UG programme.
Hope this helps.

It all depends on your AIR. Given that, you got 71% in JEE Mains, I am assuming you have a score of 255-256 which brings you a rank of around a maximum of 3K which means you have a guarantee to get in DA-IICT. The cut-off ranks are around 12K.
Hope this helps.

Indian institutes of technology are the best in business. So, for placements, IIT is much better option than PDPU.

Another beautiful campus near Chandigarh, which is very good in infra, academics, placements and industry interface is Indo Global Group of Colleges. One must visit there, and then can decide accordingly.

The last date to apply online is 12.00 PM(midnight) 19th May, 2018.

Yes, it is compulsory to live in the hostel even if you live in Ahmedabad or even Gandhinagar. You will be free to go home on weekends.

Please find the placement details in the link below:
http://spm.pdpu.ac.in/downloads/Final Placements 2018 Update.pdf