First round was HR, asked profile summary. Next round f2f in their office. Total 2 rounds, manger goes through resume and asks questions. Then technical round. Explained the problem they are facing , I gave my approach, before that I asked questions related to this problem, but received standard answer..." Forget about it. How do you solve this problem". I don't know code base, I don't know environment and context and expecting me to solve on the spot. Later I received information that I was rejected technical round. I surprised. No single technical question except this problem.