KeyValue Software Systems Associate Software Engineer interview questions

I attended a 5 round interview process at KeyValue Software Systems, which included an aptitude test, programming round, buildathon, technical interview, and HR round. The overall process was lengthy and demanded significant time, and effort. During the HR round, I was clearly informed that the final result selection or rejection would be communicated via email within one week. However, even after waiting for more than three weeks, I received no response at all. Later, I learned that candidates from other colleges had already received their results, which made the silence even more discouraging. The complete lack of follow-up and closure felt like being ghosted after investing so much effort. Even a simple rejection email would have been appreciated.