Amazon Interview Experience for SDE-2

I was interviewed for the Amazon SDE 2 role.

Round 1 (Online Test, Hackerrank):

I don’t remember the exact question but it was based on String and the other was sliding window.

https://www.geeksforgeeks.org/problems/longest-k-unique-characters-substring0853/1

It was similar to the above question.

Round 2 (Video Call, Technical):

Started with a basic introduction and then two DSA questions.

1. https://www.geeksforgeeks.org/problems/burning-tree/1
2. https://www.geeksforgeeks.org/problems/find-the-number-of-islands/1

I solved the first question completely but for the second question, I explained to him the approach but could not write code as time over.

Round 3 (Video Call, HLD):

Question: Design a News Feed System.

The Interviewer was not satisfied with my answer.

I got call from HR and was rejected after this round.