Meta Network Production Engineer interview questions

Got a call back during early February, Did the OA which was fairly easy. Moved onto the Coding Onsite Interview round in the following week. Since Meta was close to their hiring cutoff period, what normally takes 3 months was to be wrapped up in under a month. Coding round went well. Followed by the Networking interview, which for some reason the interviewer wasn't available so the interview had to be pushed back by 3 weeks. Gave the final round in the first week of March, got a reject few days later