Reflecting on the experience, I gained valuable insights, even though I ultimately declined the offer. The interview started with a technical round, where I faced a coding question about finding the smallest window in a string. It hit me that this was a problem I had worked on through PracHub just days before. Following that, there was a system design question focused on creating a real-time chat system. The process was smooth, and the interviewers were approachable, making it a positive journey overall.

Find the smallest window in a string containing all target characters.

Design a scalable real-time chat system with delivery guarantees.