Regarding placement, I'll give a better insights regarding this

1. Big 4 NIT's - NIT A, NIT Trichy, NIT Suratkhal, NIT Warangal

2. Best 3 IIIT's - IIIT A, IIIT H, IIIT B

3. Mideocre NIT's - like NIT raipur, nit hamirpur, nit durgapur, nit bhopal

4. Lowest nit - nit sikkim, nit patna, nit silchar, nit agartala

5. mideocre IIIT - IIIT guhawati, iiit lucknow, iiit trichy

6. GFTI 

7. lowest iiit

Order

1 > 2 > 3 = 5 > 7 > 6 > 4