Nagarro Software Developer interview questions

First round was codding test, the second round was technical interview, they asked the question related to tree, string and 1 question based on nqueen problem. then the final round was HR interview

The interviewer was very rude, also laughing a bit and my interview was for angular Developer but he was asking me java questions. But then also I tried to give the answers. I also told him that I am from UI background but he told me that in his team he needs backend Java Developer but my first two rounds which I cleared using my angular skills only.