4 tech round and 1 hr round. Question were related to project dsa , database index and system design . Discussion was near scalability issues and fault tolerance. In dsa 2 search problem was given

There were 4 rounds of interviews (3 technical rounds and 1 aptitude test). Initially, the HR mentioned there would be only 3 rounds, but suddenly an aptitude test was added—which was unexpected, but I went ahead with it. I’ve now completed all the rounds, and I’ve been trying to follow up regarding the result of the final round (Round 4). However, the HR has only responded with “I’m busy, will let you know,” and there has been no further communication since then. To be honest, I’m quite disappointed with the lack of proper communication. I understand if I’ve been rejected, but I would appreciate it if you could simply let me know the result—either way.