FedEx Front End Developer interview questions

I interviewed at FedEx Hyderabad. Process took arround 1 week. There was total 2 technical and 1 manager round. Technical questions was very easy to crack in both rounds. I answered all the questions in the tech rounds. Manager round was based on how did you handle critical scenarios, approach in the past project. I explained well as much as I can, but unfortunately got rejected and they didn't give me proper reason for rejection. I was completely disappointed.