Yes, CGPA matters. Most recruiting companies participating in the NIT Trichy placement drive have a cutoff. For software companies, the required cutoff is lower and more emphasis is placed on skills and communication skills. While for core companies the required cutoff is higher. Try to have a CGPA of above 8, to be safe.
A CGPA will help you get over the initial hurdles. After you clear the online tests and interviews, the selection will depend on your performance.
Yes, the CGPA matters for placements at NIT Trichy but then again, it depends. If you have a minimum GPA of 8, things will run a little smoother for you during the placements.
Every student who has a decent profile will get placed with a good offer. You will have a lot of opportunities if you plan to go into software, analytics, or related industries irrespective of your CGPA.