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Updated weekly · Last refresh Nov 11

Viasat Data Engineer Interview Questions

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

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1
SQL & Data ManipulationStart here. 3 questions + 3 drills · ~58 min
Join Types in SQLEasy
Recently asked

Tests SQL fundamentals and correct join selection for accurate analytics.

JoinsData ManipulationsqlViasat
Star vs Snowflake SchemaMedium
Recently asked

Tests dimensional modeling knowledge and trade-offs for analytics performance and maintenance.

data engineeringschema designData ModelingViasat
Optimize Slow SQL on Large DataHard
Recently asked

Tests query optimization skills, performance reasoning, and practical tuning approaches.

Performance Tuningquery optimizationsqlViasat
Aggregate Usage to Flag Over-Cap SubscribersMedium
Practice
Recently asked
Practice drill

Aggregate Viasat session usage once, identify subscribers over their caps, and explain why the 6-billion-row table is slow.

large datasetsindexessqlViasat
Rank Customers by Monthly UsageMedium
Practice
Practice drill

Rank Viasat customers by monthly usage within each assigned region, including tied usage totals.

Window FunctionsDate FunctionsJoinsViasat
Rolling 7-Day Average with Window FunctionsMedium
Practice
Practice drill

Calculate patient rolling 7-day averages and rank patients within each research site using layered window functions.

Window FunctionsRankingRunning TotalsMedpaceCharles SchwabStanford School of Medicine
2
Behavioral & Leadership6 questions · ~57 min
Communicating Your Projects ClearlyMedium
Recently asked

Assesses clarity of technical communication and ability to explain project decisions and outcomes.

Viasat
Handling Unexpected Data Source ChangesMedium
Recently asked

Tests adaptability and safeguards when upstream systems change without notice.

data engineeringProblem SolvingadaptabilityViasat
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3
More topics3 questions · ~28 min
Parse Nested JSON FieldsMedium
Practice
Recently asked

Traverse nested dictionaries and arrays to extract requested JSON fields using dot-separated paths.

CodingArraysjson parsingViasat
Debugging Production Data PipelinesMedium

A structured approach to debugging production data pipelines, with focus on orchestration, data quality, idempotency, and safe backfills.

InfrastructureToolsQualityViasat
Retry Mechanism for Failed API CallsMedium
Recently asked

Tests resilience patterns and correct handling of transient failures in data ingestion.

error handlingapipythonViasat

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