Amazon Software Development Engineer SDE I interview questions

Virtual Zoom Interviews 4 in total and each of 1 hr duration. Overall positive interview experience. Process kicked off with OA followed by Onsite. Onsite rounds included System design, OOAD, DS & Algo along with LP questions.

I applied through a recruiter referral and I interviewed at Amazon (Bangalore India) in June 2021 20, April: I was invited to take an online assessment hosted at hackerrank, in which I was asked two questions, one about DFS graphs and the other about Min heaps. I did both the questions in less than an hour. After 15 days, a recruiter contacted me to tell me that she needed to book four interviews for me on May 15th and told me that I would receive a call on the 13th to choose the times for all four. She also mailed a few documents which contain how to interview with amazon and leadership principle details. May 16th: I sent multiple emails to the Amazon recruiter till 16th May but didn't receive any call to schedule the interview which was supposed to happen on 16th. Also, the phone number from which I received the call is out of range all the time. Around midnight on May 16th, I received an email from a new recruiter informing me that they had changed both my recruiter and point of contact and that they would contact me by May 22nd. On 22th a new person contacted me and told me that my point of contact asked him to set the interview date and time for 2 interviews (point to note earlier I had 4 interviews but now they want to take only 2). We discussed two free one-hour slots for the same day. On the day of the interview, I had two rounds, one scheduled in the morning and the second in the evening. In the morning interview: I got two coding questions based on Leetcode DP hard and Trees Medium and I solved both of them. Initially struggled with DP problem but in the end able to solve it. In the Evening Interview: I got two coding questions, one based on Graphs Leetcode Medium and the other based on design. In this interview, I answered both questions without hesitation, and the interviewer was very impressed, telling me that I did very well on both questions. The design questions came completely out of the blue and were completely unexpected. but having some experience I shared my approach and the interviewer was happy. Also, there was some Amazon leadership-based problem in which I followed the STAR principle. After these two interviews, I have waited for 7 days but no response from the recruiter or point of contact. I have mailed the POC but no response. After the next 7 days, I received a mail that they don't have an opening for the person of my skillset. So, they won't be moving forward. After a two-month terrible encounter, the ultimate result was an extremely nasty email in which they said they didn't have any openings. So, why did they take my interviews and squander my critical two months? F* Amazon, you're a complete waste of time.