Hi Chandra,
Yes IIIT Guwahati is an excellent choice after IIIT Hyd, Allahabad. The placement records and packages are improving year by year, and it is much better choice when compared to IIIT Lucknow, Kota or Bhubhaneshwar.
You can refer to this link for all placement details: http://iiitg.ac.in/placementinfo.php
Cheers.
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