An online test was provided I solved it using C++. I got shortlisted for f2f interview First round of interview: The interviewer directly jumped into the questions he already wrote on google docs. 1. A binary tree is given -> for a particular node sum of path equals sum of all parents and value of current node -> find max sum of path 2. Print array in spiral form After I solved 1st question, and was in midway of solving 2nd question, my wifi was not working. The interviewer called me and asked if he should reschedule. I said I know how to solve the second question correctly, so I can proceed on the call itself explaining how to solve the 2nd question. Then he said, that now he will change the question as I know how to solve it already. Who changes question in midway of solving ? If He needed to change the question then why did he even bother to ask me the 2nd question Then he changed the question to 3. A binary tree is given. Find all nodes at distance d from a particular target node. I wrote the working pseudo code, and explained it to him again. If at some point he thought my approach isn't going to work, he should have pointed it out. Rather he said that he understood my approach clearly. Then he left in hurry that he has some other meeting to attend. Next day HR mailed me that I am not shortlisted for next round. No feedback provided I don't know what they require in a candidate and that too in DS/Algo round