IBM Java Software Engineer interview questions

I was called for an interview for a specific project. HR did really good job at coordinating but the interviewer lacked basic manners. He was not ready to accept any answers other than what he expected. Firedrill started during interview and we were expected to vacate the building. I asked his number to come back after 30mins. After 30 mins, when I called back, he said he's still moving back to his place and asked to call after sometime (crowd had dispersed around 20 mins ago). When I called after 30 mins, he disconnected and I received call from HR telling I didn't perform well. I did or did not perform and that deserves a respectful rejection. People who work at such organizations at the senior post lack some basic manners and assume they own the company. Any sensible person would value others time.