Infosys Software Developer interview questions

i was interviewed at college. whole process took 2 days. a written test on first day and document verification followed by interview on next day. Interview was good and HR was nice. He asked about myself and asked me to write codes. I wrote them but i was not selected.

Was referred by an internal employee, interview was scheduled in weekend, about 200-400 candidates were waiting for the interview with different skill set, first round was f2f it was average difficult after clearing there ll be hr interview, after clearing all rounds hr said v may release offer after 2 weeks, after 4 days got regret mail from Infosys saying currently they are no requirements for the applied skills set. If yoy know there are no requirements for applied skill set, then why did you called me...wasted one day of weekend with there lengthy process.