Optum Software Engineer Interview Questions

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

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Explain ACID in Transaction Systems

Easy

Explain the four ACID properties and why they matter for reliable transaction processing in SQL systems.

acid propertiestransactionsdata integrity

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Normalization vs Denormalization Tradeoffs

Medium

Explain normalization, why it improves data integrity, and when denormalization is a practical performance tradeoff.

schema designperformanceData Modeling

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DSA: Basic Coding Practice

Easy

Tests baseline data structures and algorithms preparation for the coding round.

Basic AlgorithmsProblem SolvingData Structures

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Middle of a String

Easy

Tests string manipulation and edge-case handling for basic algorithmic problems.

time complexityBasic AlgorithmsStrings

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Number of Islands with BFS/DFS

Medium

Tests graph traversal skills and ability to implement BFS/DFS correctly.

dfsbfsGraphs

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Event-Driven Order Service with Kafka

Hard

Tests ability to design scalable event-driven services and reason about Kafka-based architectures.

design systemkafka

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