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TransUnion Software Engineer Interview Questions

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

50questions
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1
CodingStart here. 25 questions · ~245 min
Palindrome and String ReversalEasy
Practice

Determine whether a string is a palindrome and return its reversed form using two-pointer string processing.

string manipulationTransUnion
Functions, Structures, and Data StructuresEasy
Practice

Determine whether a TransUnion TruVision label is a palindrome using a reusable function and constant extra space.

functionsData StructuresTransUnion
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2
SQL & Data Manipulation10 questions + 3 drills · ~128 min
Explain SQL Join TypesEasy
Recently asked

Explain INNER, LEFT, RIGHT, FULL OUTER, CROSS, and SELF JOINs with examples and when to use each.

JoinsData WranglingGroup ByTransUnion
SQL Query OptimizationMedium
Recently asked

Tests your approach to diagnosing and improving SQL performance.

Performance TuningsqlTransUnion
Running Totals and Moving AveragesMedium
Practice
Practice drill

Calculate monthly credit utilization, running totals, and three-month moving averages for TransUnion customers.

Window FunctionssqlRunning TotalsTransUnionCNA
Top Accounts by Support Ticket VolumeEasy
Practice
Practice drill

Task You are given support ticket data and account metadata. Write a PostgreSQL query that returns the top 10 accounts by support ticket volume in the last...

JoinsGroup ByAggregationsTransUnion
Top Customers by Sales RevenueEasy
Practice
Practice drill

Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.

RankingGroup ByAggregationsHousecall ProEquifaxXYZ
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3
Pipelines3 questions · ~29 min
Kafka Custom SerializersHard

Evaluates your understanding of Kafka serialization and how to integrate it safely into pipelines.

TransUnion
Agile Methodology and Batch ProcessingMedium

Assesses your ability to work effectively in Agile delivery and batch-oriented systems.

javaAgileBatch ProcessingTransUnion
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4
System Design3 questions · ~29 min
Inheritance, Polymorphism, and OOP PillarsHard

Evaluates your ability to apply OOP principles in a realistic design and code structure.

designoopTransUnion
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5
Behavioral & Leadership7 questions · ~68 min
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6
More topics2 questions · ~20 min
Web Application Vulnerability ExampleMedium

Evaluates your security fundamentals and ability to reason about real-world risk.

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