Amazon SDE - 1 interview questions

4 rounds, 1.coding Ds algo 2. same 3. same 4. os , networking all the rounds were concluded on the same day, , the test was taken on hackerearth. there were 3 coding questions in the test . any one who solved 2 questions got the interview call

I had an HR call followed by Phone interview where string parsing question was asked along with behavioral questions and the final remote onsite round consisting of 4 interviews with every round of programming and behavioral question