I Interviewed in 4i apps at March 2019, first round was written test which contains aptitude, programming, logical skills, technical questions. this was quite easy. I got selected for the next round.. it was technical round. actually there were many technical rounds and I cleared them all. after all the rounds were over they asked some of the candidates to leave the office saying that they would mail them. they informed the remaining that all are being selected and also discussed about the company etc, they told that they ll send us the offer letter through mail but didn't send any mail. no prior response after that.