Top 45
Prep plan
Updated weekly · Last refresh Aug 30

Grid Dynamics Data Engineer Interview Questions

The questions to prepare for a Grid Dynamics Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

45questions
~6htotal time
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1
CodingStart here. 8 questions · ~69 min
Merge Two Sorted Linked ListsEasy
Practice

Merge two sorted singly linked lists into one sorted list by relinking existing nodes.

RecursionLinked ListsSortingGrid Dynamics
Scenario-Based Data Processing in Scala or PythonMedium

Tests your ability to implement data processing logic in production-oriented languages.

Hash TablesArraysSortingGrid Dynamics
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2
Pipelines20 questions · ~172 min
Data Quality and Schema EvolutionMedium

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQualityGrid Dynamics
Optimize Slow Spark ETL PipelineHard

Redesign a slow Databricks Spark ETL pipeline to cut runtime from 3 hours to under 60 minutes without breaking data quality or SLAs.

Grid Dynamics
Batch vs Streaming Data ProcessingEasy

Compare batch and streaming data processing, including when each fits best in a pipeline.

Stream ProcessingETLBatch ProcessingGrid Dynamics
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3
SQL & Data Manipulation10 questions + 3 drills · ~116 min
Schema Design for Analytics vs OLTPMedium

Explain how to choose normalized or denormalized schemas for transactional and analytics workloads, including trade-offs in performance and data quality.

JoinsData WranglingAggregationsGrid Dynamics
Building Clean Analytical DatasetsMedium

Tests your understanding of joins, keys, and data modeling for reliable analytics.

JoinsData WranglingCTEsGrid Dynamics
Normalization vs DenormalizationMedium

Tests your modeling tradeoffs for consistency, performance, and maintainability.

JoinsData WranglingAggregationsGrid Dynamics
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Top Daily Rides by VehicleMedium
Practice
Practice drill

Rank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.

Window FunctionsJoinsData WranglingWaymo
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
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4
Behavioral & Leadership7 questions · ~60 min
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The finish line: interview-readyComplete all 45 questions plus 3 hands-on drills to finish this plan.