Sophos Software Engineer interview questions

After application, a recruiter contacted me and we had a short basic interview about my resume, experiences, what the role is about, etc., it was said that next Monday I will be contacted for sure (it was a Thursday). One week after the promised response I wrote an email to get information, 3-4 days later I got a template rejection email.

On campus((online process)- 3 rounds:- Online Assessment Technical Interview Managerial +Technical interview i clear OA and Got rejected in Technical interview , they asked one DSA question on their codility platform as interview was online , the question was maximum sum of non adjacent nodes in a binary tree and system design of To do list