Amazon Technician interview questions

I applied for the 2018 new grad software engineer position. There were 2 online assessments like always. Then it was the on site interview. There were 3 rounds in total. During each round you will be asked about behavioral questions and 1-2 coding problems. The thing is, 15 days after the interview, I got a call from the HR saying the position is full already.

Contact was initially made through Email and test on technical topics. The test was a little difficult as I was not working on the subject then but anyone working on it should be able to answer without any issues.