I applied through college or university. The process took 1 day. I interviewed at Infosys (Coimbatore) in Mar 2012
Interview
It was campus drive with few rounds of general and technical followed by HR
process starting with screening interviews, which often take place on the phone, followed by in-person interviews, second interviews, and even third interviews.
I applied through an employee referral. The process took 1 day. I interviewed at Infosys (Pune) in Sep 2011
Interview
Was called for a walk-in interview. Had two rounds of technical interview.
Asked to leave after that. No communication for a month. After that got an email saying that there is no job opportunity for your profile.
2 weeks later got a call from HR saying that the email was sent by mistake and your application is currently kept on hold until further notice.