Infosys Specialist Programmer interview questions

It's too tough mostly asked me advance dsa for me they asked traffic lightss synchronisation and quantum computing it's very tough they will give 4 questions simple, medum, Hard and complex

We were selected on basis of resume shortlisting when infosys visited our campus our resumes were screened based on our gpa and department and shortlisted for written test and we called for a written test and then an interview which was the next day