AppDynamics interview questions

I applied to job on their website and recruiter contacted me. Round 1: 1 hour interview with hiring manager. Interviewer asked some behavioral + some technical questions. They checked if my experience aligns with the work that their team does. Round 2 & 3: Each interview lasted for 1 hour. Leetcode easy/medium questions followed by lots of java fundamentals questions. One of the leetcode question was related to multithreading. Round 4: Approx. 40 min behavioral round with the director. Interviewer asked basic questions related to my project and some behavioral questions.

Remote interviews scheduled after replying to online job listing. First interview, employer abruptly cancelled call five minutes into interview. Employer never showed up for second interview. No explanations offered for rude behavior Received rejection email one month later.