Amazon SDE - 1 interview questions

They sent a OA round, after clearing my interviews were scheduled. There were total of 3 round and in each round DSA questions were asked along with leadership principle. Each interview consists of 2 questions

Cleared all the rounds of interviews scheduled over the course of 3 months. After 2 months of waiting for the offer letter was told that the head count was full for the hiring season and they were not going to generate an offer letter.