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Lockton Companies Software Engineer Interview Questions

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

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1
CodingStart here. 4 questions · ~34 min
Abstract Classes vs InterfacesEasy

Compare Java abstract classes and interfaces, including inheritance rules, shared behavior, and when each is the better design choice.

javaabstractionoopLockton Companies
Difference Between Interface and Abstract Class in JavaMedium

Explain the differences between interfaces and abstract classes in Java and when to use each.

Hash TablesArraysStringsLockton Companies
Value vs Reference TypesEasy

Tests your core language knowledge and how you reason about memory and behavior.

javabasicsData StructuresLockton Companies
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2
Behavioral & Leadership7 questions · ~59 min
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3
More topics5 questions · ~42 min
Optimizing SQL Query PerformanceEasy

Explain how to improve SQL query performance using indexing, filtering, and execution plan analysis.

JoinsData WranglingAggregationsLockton Companies
Exception Handling and LoggingMedium

Tests your reliability practices for failures, observability, and troubleshooting in distributed systems.

Technical Fluencydistributed systemsLockton Companies
Designing a Data Ingestion PipelineMedium

Tests your ability to design scalable, fault-tolerant pipelines for high-volume risk data.

data integrationETLBatch ProcessingLockton Companies
Schema for Historical Policy DataMedium

Tests your data modeling skills for temporal history, auditing, and queryability of policy changes.

schema designnormalizationdata integrityLockton Companies
Secure Partner Risk APIMedium

Tests your API design skills with security, access control, and safe data exposure.

rest apispartner managementSecurityLockton Companies

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Pharmacy Spend Per MemberMedium
Practice
Practice drill

Aggregate paid pharmacy claims by member and month, keeping only claims within Lockton enrollment coverage dates.

JoinsGroup ByAggregationsLockton Companies
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
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
The finish line: interview-readyComplete all 16 questions plus 3 hands-on drills to finish this plan.