Amazon Data Scientist Data Manipulation (SQL/Python) Interview Questions
Practice the exact questions companies are asking right now.
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Process real-time enter/exit events and actives
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Find recommended friend pairs by shared songs
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Find recommended friend pairs by shared listening
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Verify subscriptions and analyze orders with SQL/Python
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Implement robust word counts and min/max
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Find daily first-order merchants with SQL
Given the table below, write a single SQL query using window functions to: A) For each calendar date (UTC), return all merchant_id(s) whose order is t...
Design student–course data models and SQL
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Diagnose MySQL joins and GROUP BY/HAVING errors
You are using MySQL 8.0 with ONLY_FULL_GROUP_BY enabled. Answer all parts precisely. Provide the exact SQL you would run and the final result shapes/v...
Append country tables and rank salaries in USD
You have separate country-level employee tables that must be appended and ranked by salary converted to USD using an exchange rate table. SQL schema a...
Transform event logs with subscription windows in pandas
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Transform retail data with pandas groupby/merge/concat
Using pandas only (groupby/agg/merge/concat; no for-loops), write code to answer the sub-questions below on the following small dataframes. Assume tim...
Compute daily work hours from in/out events
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Using the schema and sample data below, answer both parts. Assume today is 2025-09-01. Use standard SQL (e.g., PostgreSQL) and idiomatic pandas withou...