I received a call directly from Amazon recruiters.

The interview process consisted of:

• 1st round: A HackerRank test, which combined coding and system design questions.
• 2nd round: A coding round where I solved all questions in an optimized way.
• 3rd round: A Low-Level Design (LLD) round, where I had to design Tic-Tac-Toe, along with some behavioral questions.

I designed the entire Tic-Tac-Toe game, covering all edge cases. The interviewer asked me to cover one more edge case, which I addressed instantly.

I was rejected after the LLD round. I'm unsure of their specific expectations; perhaps they wanted the questions solved in a particular manner they had in mind. The LLD interviewer exhibited a significant attitude, and there was no real conversation. Additionally, one interviewer repeatedly joined and left the call.

This outcome was unexpected from Amazon, and they did not provide any detailed feedback.

1. Given a string s and an integer k. Find the maximum number of vowels in a substring of size k. Vowels are: a, e, i, o, u.

• s = "abciiidef", k = 3 Output: 3 (iii)
• s = "aeiou", k = 2 Output: 2
• s = "abhishek", k = 4 Output: 2

1. You have N bags of candy. The ith bag contains arr[i] pieces of candy. It takes you 1 minute to eat all of the pieces of candy in a bag, and as soon as you finish, the bag refills with x/2 pieces of candy. You have k minutes to eat as much candy as possible. How many pieces of candy can you eat?

• N = 5, k = 3, arr = [2, 1, 7, 4, 2] Output: 14