Codewalla Software Developer interview questions

There were 2 rounds of process. First Technical round: Questions related to oops,springboot,kafka,Sql,java 8 streams etc where asked cleared the first round. Second Technical round: The interview was going good was able to solve the coding questions correctly and was able to answer almost all technical questions all of a sudden the interviewer stopped and said he was done and immediately left without any response. Don't know what fun they have wasting people's time unnecessarily don't conduct interviews if you don't want to hire and waste other people's time useless company and also their useless employees.