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Delta Air Lines Software Engineer Interview Questions

The questions to prepare for a Delta Air Lines Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
CodingStart here. 20 questions · ~175 min
Maze Path From A to BMedium
Practice

Use breadth-first search to find the shortest four-directional path between two points in a Delta Air Lines airport grid.

Delta Air Lines
Java Streams and LambdasMedium
Recently asked

Evaluates understanding of Java 8 functional features and their impact on code quality.

javaDelta Air Lines
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2
System Design12 questions · ~105 min
Web Services vs MicroservicesMedium
Recently asked

Evaluates understanding of architectural trade-offs between web services and microservices.

architecturemicroservicesDelta Air Lines
AWS Serverless Deployment with CDKMedium
Recently asked

Evaluates ability to design infrastructure using AWS services and AWS CDK for deployment automation.

InfrastructureawsDelta Air Lines
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3
Execution3 questions · ~26 min
Balancing Trade-offs for EfficiencyMedium
Recently asked

Assesses how you make engineering trade-offs to improve operational efficiency in an aviation context.

Decision Makingoperational efficiencyDelta Air Lines
Adapting to Changing ConstraintsHard
Recently asked

Tests ability to evolve software designs when operational constraints and requirements change.

adaptabilityoperational challengesDelta Air Lines
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4
SQL & Data Manipulation7 questions + 3 drills · ~91 min
SQL Join Aggregation QueryMedium
Recently asked

Assesses SQL skills for joining tables and aggregating operational data.

aggregationJoinssqlDelta Air Lines
Top Routes by DelayMedium
Practice
Recently asked
Practice drill

Use joins, date filtering, aggregation, and ROW_NUMBER to find Delta's three most delayed routes last quarter.

Window FunctionsDate FunctionsAggregationsDelta Air Lines
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
SQL: Customers With Multiple OrdersEasy
Practice
Practice drill

Use a join, month-level grouping, and HAVING to find VistaPrint customers with multiple orders in the same month.

aggregationJoinssqlCCimpress Technology
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5
Behavioral & Leadership6 questions · ~52 min
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6
More topics2 questions · ~17 min
Find Active Processes on UnixMedium

Evaluates ability to use UNIX tooling to inspect running processes for troubleshooting and operations.

Delta Air Lines
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.