ZorixOS
5+ Aon questions

Aon interview questions and how to prepare

The questions candidates report from Aon interviews, sorted by how often they come up, with difficulty and topics, plus original practice written in Aon's interview style.

Practice Aon questions free All companies

ZorixOS tracks 5 community-reported Aon interview questions, drawn from an open-source dataset of real interview reports and sorted by how frequently each one comes up. Every question links to its source. Alongside them are 76 original ZorixOS practice questions written in Aon's known interview style (not claimed as asked at Aon), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to Aon.

Updated July 2026

Aon interview questions candidates report

Community-reported from real Aon interviews (open-source dataset), most-asked first. Showing 5. Each links to its source.

  1. Classifying Triangles by Lengths
    Database
    Easy100% asked
  2. Construct the Minimum Bitwise Array I
    ArrayBit Manipulation
    Easy100% asked
  3. Construct the Minimum Bitwise Array II
    ArrayBit Manipulation
    Medium100% asked
  4. Minimize OR of Remaining Elements Using Operations
    ArrayGreedyBit Manipulation
    Hard100% asked
  5. Number of Islands
    ArrayDepth-First SearchBreadth-First SearchUnion-Find
    Medium66% asked

Practice questions in Aon's style

Original ZorixOS questions written the way Aon interviews, so you rehearse the real format. Not claimed as asked at Aon.

  1. Imagine Aon's platform is experiencing intermittent latency spikes affecting client access to real-time risk analytics. Describe how you would approach debugging this issue, considering the distributed nature of our microservices and large data volumes.

    Software EngineerDebugging & PerformanceTests: Evaluates problem-solving skills under pressure and knowledge of distributed systems debugging.

  2. Design a system to ingest and process millions of real-time insurance claims data points daily for fraud detection. Consider scalability, fault tolerance, and data consistency for Aon's global operations.

    Software EngineerSystem DesignTests: Assesses ability to design scalable, resilient systems for large-scale data processing.

  3. We are seeing a significant increase in data processing times for our catastrophe modeling service. What are potential bottlenecks in the data pipeline, and how would you identify and resolve them? Focus on optimizing for large datasets and complex calculations.

    Software EngineerPerformance OptimizationTests: Tests understanding of performance bottlenecks in data-intensive applications.

  4. Aon's client portal allows users to view their aggregated risk profiles. How would you design a caching strategy to ensure low latency for frequently accessed data while maintaining data freshness and consistency for millions of concurrent users?

    Software EngineerSystem DesignTests: Evaluates knowledge of caching mechanisms and trade-offs in high-traffic applications.

  5. Write a Python function to identify duplicate client records in a large CSV file (millions of rows) based on a combination of name, address, and date of birth, considering potential data inconsistencies. Assume the file is too large to fit into memory.

    Software EngineerCoding & AlgorithmsTests: Tests coding proficiency, handling of large data, and algorithm selection.

  6. Our risk assessment service relies on integrating with numerous external APIs for market data. How would you design a robust error handling and retry mechanism for these integrations to minimize disruption to our clients?

    Software EngineerResilience & Error HandlingTests: Assesses understanding of building reliable integrations in complex environments.

70+ more Aon-style questions are in the free library, each practiceable live with adaptive follow-ups and an honest scorecard. Start free.

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Aon Interview Questions (2026) | ZorixOS