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Updated weekly · Last refresh Oct 17

Applied Materials Data Engineer Interview Questions

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

28questions
~5htotal time
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1
SQL & Data ManipulationStart here. 6 questions + 1 drill · ~78 min
Star vs Snowflake for OpsMedium

Explain how to choose between star and snowflake schemas for corporate operations reporting, balancing query simplicity, integrity, and performance.

snowflake schemastar schemaData ModelingApplied Materials
Four-Hour Moving AverageMedium
Practice

Calculate each Applied Materials equipment reading's four-hour moving temperature average with a time-based window.

Window FunctionsDate FunctionsData ManipulationApplied Materials
Schema for Component MaintenanceHard

Tests data modeling for maintenance and failure tracking across distributed manufacturing sites.

fact tablesdimensionsData ModelingApplied Materials
SQL for Weekly Operational MetricsHard
Practice
Practice drill

Join eBay orders, shipments, and support tickets to calculate weekly fulfillment and service metrics.

JoinsGroup ByAggregationseBayEchostarWhiteHat Jr
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2
Pipelines6 questions · ~68 min
Handle PySpark Data SkewMedium

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

Data Qualitypysparkdata skewnessApplied Materials
Spark Memory TuningHard

Tests practical Spark tuning knowledge for performance and stability at scale.

InfrastructureperformancesparkApplied Materials
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3
Coding7 questions · ~79 min
Percentile Value in MatrixHard

Evaluates your approach to algorithm design and efficient computation for percentile-style queries.

MatrixApplied Materials
Cycle Detection in ETL DependenciesMedium
Practice

Use DFS and node-color states to determine whether an Applied Materials ETL dependency graph contains a directed cycle.

Recursiondfscycle detectionApplied Materials
Sorted Arrays IntersectionMedium
Practice

Find values shared by every sorted array using coordinated pointers in linear time.

ArraysAlgorithmsApplied Materials
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4
Behavioral & Leadership9 questions · ~102 min
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The finish line: interview-readyComplete all 28 questions plus 1 hands-on drill to finish this plan.