Google Summer Intern interview questions

The first round was a on call screening round,then we had a google meet where they asked me to introduce myself then was asked a DSA question the duration was 45 minutes

No OA in our college simply shortlisting based on resume. 2 interview rounds (both dsa based) Round 1 -> Two dsa garph questions, second one being follow up of the first one. Round 2 -> Super hard garph question couldn't come up with optimal solution. Result -> Rejected