BITS -Pilani definitely has an edge over the placement offers compared to multiple universities across India.
But coming to specific student, it all depends on his academic performance and additional projects involving creativity, innovation matters.
There might be some students who may not have selected during on campus placements but got PPO on their PS-2
Overall the opportunity to get placement offer before completing BE is pretty good!!
For any additional information you can contact placement division, BITS -Pilani.
Hope it helps !!