Gaian Solutions India Developer interview questions

Initially a screening round where they check for fluency.Multiple technical rounds (3-4) where they ask questions related to java ,data structures and SQL.Questions related to the project are asked as well.Final HR round is simple and friendly easily completed. The entire process will done within two days. Despite clearing all the rounds and formally accepted for the job I haven't received the offer letter ; their reason was "internal problems"

Multiple rounds of interview, asked to code a problem statement on a sheet of paper, very arrogant interviewer who gave sarcastic comments if you cannot answer the question. 5 rounds of interview over a span of 4 weeks