Top 16
Prep plan
Updated weekly · Last refresh Oct 17

Aon Software Engineer Interview Questions

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

16questions
~3htotal time
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1
CodingStart here. 3 questions · ~30 min
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysAon
Implement Binary SearchEasy
Practice

Implement binary search to find a target value in a sorted array in O(log n) time.

Recursionbinary searchArraysAon
Programming Languages and FitEasy

Tests technical depth and ability to justify tool choices based on outcomes.

Hash TablesArraysStringsAon
2
Execution5 questions · ~51 min
Choosing Monolith vs MicroservicesMedium

Explain how you would decide between a monolith and microservices for a new engineering initiative.

Trade-offsRisk AssessmentScope ManagementAon
System Design Trade-OffsMedium

Tests your system design reasoning, prioritization, and ability to communicate trade-offs clearly.

Trade-offsRoadmappingRisk AssessmentAon
Debugging a Production IssueMedium

Tests your incident triage process, hypothesis-driven debugging, and communication during outages.

Rollback PlanTrade-offsRisk AssessmentAon
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3
Behavioral & Leadership7 questions · ~71 min
Leading an Ambiguous Engineering ProjectEasy

Tests leadership through ambiguity, ownership, and stakeholder alignment when a project lacks clear direction.

CommunicationLeadershipOwnershipAon
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4
More topics1 question · ~10 min
Real-Time Data Processing DesignHard

Design a fault-tolerant real-time processing pipeline with low latency, reliable delivery, replay, data quality, and scalable serving.

data pipelineInfrastructureStream ProcessingAon
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