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Updated weekly · Last refresh Sep 10

Maersk Data Engineer Interview Questions

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

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1
SQL & Data ManipulationStart here. 7 questions + 1 drill · ~73 min
SQL Subquery for Top ResultsMedium
Practice

Use a subquery to find the two Maersk ports handling the most completed TEU in January 2026.

sqlMaersk
Star vs Snowflake for Sales AnalyticsMedium

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

JoinsData WranglingGroup ByMaersk
SQL and Python Data WorkMedium
Practice
Practice drill

Use a CTE, join, and conditional aggregation to summarize valid monthly user activity.

JoinsData ManipulationsqlAdobe
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2
Pipelines5 questions · ~45 min
Partitioning vs Bucketing at ScaleMedium

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

Maersk
Handle PySpark Data SkewMedium

Approach for detecting and mitigating skew in PySpark pipelines using partitioning, join strategies, and runtime monitoring.

Data Qualitypysparkdata skewnessMaersk
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3
Coding3 questions · ~27 min
Python Memory Management and GCMedium

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

memory managementbasicspythonMaersk
Python Decorators and Timing WrapperMedium

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

functionsdecoratorspythonMaersk
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4
Behavioral & Leadership11 questions · ~99 min
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5
More topics2 questions · ~18 min
End-to-End Pipeline ArchitectureMedium

Tests ability to design and deliver reliable data pipelines end to end, including tradeoffs and ownership.

data pipelinetechnical experiencearchitectureMaersk
Handling Out-of-Memory DatasetsMedium

Tests practical strategies for scalable processing, including streaming, partitioning, and memory-aware design.

memory managementdata processingtechnical experienceMaersk
The finish line: interview-readyComplete all 28 questions plus 1 hands-on drill to finish this plan.