I received Amazon offer in May. 180k TC. There are a ton of resources so I want to share which resources I used that helped me the most.
The actual interview questions I received appear in many posts and are included in the subset of preparation materials I include so I will not be discussing the actual questions I received.
By the time I did the onsite interview, I had completed about 400 Leetcode questions all time, and about 200 Leetcode questions in the two months of my job searching leading up to the interview.
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This leetcode post has good practice questions I would recommend doing all of them and there are some extras in the comments. https://leetcode.com/discuss/interview-question/488887/Amazon-Final-Interview-Questions-or-SDE1 This post is great for the Online Assesment I would recommend completing all of these questions before doing the OA. https://leetcode.com/discuss/interview-question/344650/Amazon-Online-Assessment-Questions
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Watching a couple of videos from this channel was helpful to prepare and understand what to expect for behavioral portion of interview. I also highly recommend "role playing" with another person to help prepare speaking out loud your anecdotes. https://www.youtube.com/channel/UCw0uQHve23oMWgQcTTpgQsQ
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Doing all the mock interviews from leetcode under Amazon, so every problem set available. This is good for practicing speed.
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In Cracking the Coding Interview, there are some OOP Design questions in their own section, I practiced about 5 of them within 48 hours of my onsite interview. (File System, Deck of Cards, Parking Lot, etc)
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I also found some interview experiences on leetcode as well as glassdoor, I wouldn't recommend going too crazy but doing like 5-10 of them should suffice in giving you an idea of the overall difficulty of interview questions to expect.