Maersk Data Engineer Interview Questions

The questions to prepare for a Maersk Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

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Star vs Snowflake for Sales Analytics

Medium

Compare star and snowflake schemas for warehouse design, including trade-offs in normalization, query simplicity, and analytics performance.

JoinsData WranglingGroup By

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Maersk

Diagnosing Slow Multi-Join Queries

Hard

Tests query performance troubleshooting using execution plans, indexing, and join strategy improvements.

Performance TuningJoinsperformance

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Maersk

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Partitioning vs Bucketing at Scale

Medium

Design a Hive/Spark pipeline for Meta-scale event tables and explain when to use partitioning vs bucketing for performance and maintainability.

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Maersk

Spark Driver and Executor Memory

Hard

Tests deep Spark tuning skills to improve stability and performance under Maersk-scale workloads.

Infrastructureperformancespark

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Maersk

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Python Decorators and Timing Wrapper

Medium

Explain how Python decorators wrap functions and implement a custom decorator that logs execution time.

functionsdecoratorspython

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Maersk

Python Memory Management and GC

Medium

Explain Python reference counting, cyclic garbage collection, and how memory is reclaimed.

memory managementbasicspython

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Maersk

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