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Northrop Grumman Data Engineer Interview Questions

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

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1
PipelinesStart here. 20 questions · ~160 min
Large-Scale Data Pipeline ChallengesMedium

Discuss the main pipeline challenges that appear as data volume, velocity, and system complexity grow.

InfrastructureQualityNorthrop Grumman
Data Governance in PipelinesMedium

Describe a practical approach to data governance across shared data pipelines, including quality, ownership, lineage, and controlled data access.

InfrastructureQualityNorthrop Grumman
ETL vs ELT Trade-offsEasy

Compare ETL and ELT, and explain when ELT is the better pipeline pattern.

ETLELTData ModelingNorthrop Grumman
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2
SQL & Data Manipulation5 questions + 3 drills · ~70 min
SQL and NoSQL OptimizationMedium

Evaluates your ability to optimize queries, schemas, and storage for complex workloads.

database optimizationnosqlsqlNorthrop Grumman
Key Pillars of Data GovernanceMedium

Evaluates your grasp of governance components such as ownership, standards, and controls.

data managementNorthrop Grumman
Compliance With Security ProtocolsMedium

Tests your ability to operationalize security requirements across the data lifecycle.

data managementsecurity complianceNorthrop Grumman
SQL, Modeling, and Streaming DesignMedium
Practice
Practice drill

Design a relational streaming-event model and return each actor's latest processed event using a CTE and window function.

data managementsqldatabase designRoblox
SCD Type 2 in WarehouseHard
Practice
Practice drill

Create versioned Roku customer and device records with effective timestamps and current-row indicators.

data managementtransactionsdata integrityRoku
Data Integrity Across Legacy SystemsHard
Practice
Practice drill

Audit records from legacy systems and flag missing mappings, duplicates, missing canonical data, and attribute mismatches.

Joinsdata managementlegacy systemsAMD
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3
Behavioral & Leadership13 questions · ~104 min
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4
More topics2 questions · ~16 min
Privacy With Authorized AccessibilityMedium

Assesses your approach to access control, privacy protections, and authorized data sharing.

accessibilityStakeholder Managementdata privacyNorthrop Grumman
Governance and Compliance in Regulated EnvironmentsMedium

Evaluates your governance and compliance practices for sensitive, regulated datasets.

security complianceNorthrop Grumman

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