What are the CGPA cut-off criteria for sitting into placements for the companies like Google, MS, Yahoo, Amazon, eBay, Oracle, CISCO, Intel, IBM?

This year it was
MS, Amazon:6
Google,Oracle,CISCO:7
Yahoo: 7.5
Intel,eBay:8
IBM Research: (9+ direct interview, else Prof’s recommendation)
PS:Fluctuates under ±1 per year
7 is safe, 8 is good enough