Amazon SDE 1 interview questions

I had only 1 round which is a virtual interview. Where I have been interviewed by 2 Amazonian's . They asked me 3 DSA questions. One is based on heaps, the other one is a dp question and the last one was a tree question.

1.Online Assessment 2.Technical Interviews coding questions based on DSA:-Arrays, Strings, Linked List, Stack, Queue, Recursion, Backtracking, Tree, Graphs, Graph Algorithms, Searching Algorithms, Sorting Algorithms, Hashing, Dynamic Programming (DP), all concepts brushup to take interviews.