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Updated weekly · Last refresh Aug 30

Capital One Data Engineer Interview Questions

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

25questions
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1
PipelinesStart here. 11 questions · ~88 min
Highly Available AWS Data PipelinesMedium
Recently asked

Tests your ability to design highly available AWS-based data pipeline architectures.

data pipelinearchitectureawsCapital One
Partitioning and Skew MitigationHard
Recently asked

Assesses your ability to improve distributed processing performance through partitioning and skew mitigation.

partitioningCapital One
Securing Sensitive Financial DataMedium
Recently asked

Assesses your approach to protecting sensitive financial data in AWS environments.

cloud environmentSecurityawsCapital One
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2
SQL & Data Manipulation7 questions + 3 drills · ~86 min
Optimizing Redshift PerformanceMedium
Recently asked

Evaluates your Redshift tuning and cost-management strategies.

performancequery optimizationCapital One
Rolling Window Customer TransactionsMedium
Recently asked

Tests your SQL skills for efficient rolling-window aggregations on customer transaction data.

aggregationsqlCapital One
Snowflake Data ModelingMedium
Recently asked

Evaluates your Snowflake modeling decisions for performance, maintainability, and usability.

schema designData ModelingCapital One
Analyze Customer Purchase Trends with Window FunctionsEasy
Practice
Recently asked
Practice drill

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

The Home DepotAvisoWorld Wide Technology
Top 5% Customers by ChannelMedium
Practice
Practice drill

Use CTEs and percentile-style ranking to find the top 5% of customers by 30-day transaction volume within each marketing channel.

Window FunctionsDate FunctionsRankingCapital OneWells FargoCredit Saison India
Window Functions for MoM ChangeMedium
Practice
Practice drill

Use CTEs and LAG to calculate monthly average cardholder transaction volume and month-over-month percentage change.

Window FunctionsLag/LeadAggregationsCapital One
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3
Behavioral & Leadership6 questions · ~48 min
Clean Code Under Deadline PressureMedium
Recently asked

Assesses your ability to deliver under pressure while maintaining code quality and scalability.

clean codetime managementscalabilityCapital One
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4
More topics1 question · ~8 min
Coding: Matrices and AlgorithmsHard

Tests algorithmic problem-solving and coding ability under interview constraints.

leetcodeMatrixCapital One
The finish line: interview-readyComplete all 25 questions plus 3 hands-on drills to finish this plan.