Amazon Interview Questions

The questions to prepare for Amazon interviews, across all roles. Questions from real interview reports rank first. Updated daily.

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CodingStart here. 25 questions · ~563 min

First Non-Repeating CharacterEasy

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Find the first non-repeating character in a string using frequency counting and a second pass in O(n) time.

Hash TablesStringsSearching

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Rotting Oranges With BFSMedium

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Use multi-source BFS to find the minimum time for all reachable fresh oranges to rot.

ArraysbfsAlgorithms

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Kth Largest ElementEasy

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Find the kth largest value in an unsorted array using a selection algorithm or heap.

ArraysSortingHeap

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Maximize Profit from Stock PricesEasy

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Calculate the maximum profit from buying and selling stock once.

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SQL & Data Manipulation25 questions · ~563 min

Calculate Monthly Sales Growth by Product CategoryMedium

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Calculate month-over-month sales growth for each product category using JOINs and window functions.

JoinsAggregations

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Compute Z ScoreMedium

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Calculate each sale's z score against the non-null sales distribution using PostgreSQL.

null handlingdata anomalyAggregations

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First 100 Days Visualization ComparisonMedium

Practice

Compare daily units sold for Product1 and Product2 during their first 100 days after launch.

Date FunctionsCTEsAggregations

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