Amazon Kuiper Commercial Services Data Engineer Interview Questions

The questions to prepare for a Amazon Kuiper Commercial Services Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

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SQL & Data ManipulationStart here. 13 questions · ~129 min

Second Highest Without AggregatesHard

Practice

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-Joins

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Total Sales by Category and LocationMedium

Practice

Use joins, effective-dated pricing, filtering, and aggregation to calculate Kuiper sales by category and location.

aggregationsql

Amazon Kuiper Commercial Services

SQL Running Total by DateMedium

Practice

Aggregate posted OneTrust privacy request charges by date and calculate cumulative revenue with a CTE and window function.

Window FunctionsDate FunctionsRunning Totals

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Coding7 questions · ~70 min

Maximum Subarray SumEasy

Practice

Compute the largest sum of any contiguous subarray using Kadane's algorithm in O(n) time.

Dynamic ProgrammingArraysGreedy

Amazon Kuiper Commercial Services

Reverse a Linked List in PythonEasy

Practice

Reverse a singly linked list in place using an iterative pointer update or recursion.

RecursionLinked Listspointers

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Pipelines9 questions · ~90 min

Backfilling Missing Pipeline DataMedium

Approach for safely backfilling missing data while preserving correctness, idempotency, and data quality.

ETLQuality

Amazon Kuiper Commercial Services

Data Warehousing in PipelinesEasy

Explain what a data warehouse is and why it matters in analytics pipelines.

InfrastructureETLData Modeling

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Explain ETL in Data EngineeringEasy

Explain the ETL process, why it matters, and how it fits into a practical data pipeline.

ETLOrchestrationQuality

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Behavioral & Leadership8 questions · ~80 min

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