Infosys Software Engineer interview experience

First I had to do an OA where I solved 3 out of 4 questions, then I moved into interviews that felt more like a full stack of expectations rather than just DS/Algo.

In the interview, I was asked to pick one of two DSA problems, and then I had two graph problems explained on paper. After that, the round broadened into core subjects that included DBMS, OS, and OOP. The most distinctive part was a design segment where I had to work through an LLD using a Factory pattern, and then go further into an HLD for a PVR movie ticket booking system. They probed something concrete like atomic seat