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Updated weekly · Last refresh Oct 17

MediaMath Data Engineer Interview Questions

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

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1
CodingStart here. 5 questions · ~45 min
Detect Anomalies and OutliersMedium
Practice

Identify numeric outliers by calculating quartiles and applying the interquartile range rule.

ArraysSearchingSortingMediaMath
Time Complexity of Sorting AlgorithmsEasy

Compare common sorting algorithms by best, average, and worst-case time complexity and explain when each is appropriate.

MathArraysSortingMediaMath
Merging Datasets in PythonMedium

Tests practical Python skills for dataset manipulation and correctness under common edge cases.

Hash TablesArraysMatrixMediaMath
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2
Pipelines12 questions · ~109 min
Diagnose Slow Dashboard PipelinesEasy

Approach for finding and fixing a slow dashboard pipeline, from source ingestion to warehouse queries.

InfrastructureToolsQualityMediaMath
Design Real-Time Feature PipelineHard

Design a real-time feature pipeline processing 120K events/sec into low-latency feature tables and warehouse models with replay and quality controls.

InfrastructureStream ProcessingOrchestrationMediaMath
Integrating Multiple Data SourcesEasy

Common pipeline issues when combining multiple data sources, including schema mismatch, data quality, orchestration, and duplicate handling.

ETLData ModelingQualityMediaMath
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3
More topics4 questions · ~36 min
SQL Aggregation Across TablesMedium

Tests ability to write correct SQL joins and aggregations for analytics use cases.

JoinsGroup ByAggregationsMediaMath
SQL and Database ExperienceEasy

Tests SQL proficiency and practical experience with database systems for data engineering.

JoinsData WranglingAggregationsMediaMath
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Handling Missing DataEasy
Practice
Practice drill

Replace missing sales fields with defined defaults and return a consistently ordered dataset.

missing valuesdata cleaningnull handlingUniversity of MinnesotaThe Home DepotNationwide
Top 10 Customers by SpendEasy
Practice
Practice drill

Find EarthCam's top 10 customers by total spend using GROUP BY, SUM, ORDER BY, and LIMIT.

RankingGroup ByAggregationsEarthcamAmazon AdvertisingFetch
Analyze Customer Purchase Trends with Window FunctionsEasy
Practice
Practice drill

Calculate the monthly spending trends for customers using window functions and joins.

The Home DepotAvisoHewlett Packard Enterprise
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