Went on the last day of 3- days walkin. Not much candidates were there. The HRs (3-4 were present) behaved very professionally. Kept me waited for 1.5 hours without even a single discussion. (They were just having there lunch and all in front of me). After that, discussed general questions and didn't even know that there was a walk-in that day. I had to show them the interview message I had received. Took my interview for just 5 minutes. Said that I am selected for next round. Asked me to come again another day for another round as they were 'busy' that day. Never heard from them again even after multiple follow-ups.