McDonald's Software Engineer Interview Questions

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

19questions

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CodingStart here. 4 questions · ~37 min

Explain the core differences between REST and SOAP, including message format, protocol style, and trade-offs.

Solve a Basic Algorithm ProblemEasy

Practice

Use a hash set to return each duplicated array value once, preserving its first repeated appearance order.

Hash TablesdeduplicationArrays

McDonald's

Coding Algorithms for Data ProcessingMedium

Tests practical algorithm knowledge used in real data processing tasks.

ArraysSearchingSorting

McDonald's

Data Structures: Trees and GraphsMedium

Tests understanding and application of core data structures in coding solutions.

RecursionTreesGraphs

McDonald's

Execution5 questions · ~46 min

Tests database design tradeoffs for reliability, latency, and throughput under heavy demand.

Scalable Ordering System DesignHard

Tests system design skills for high-scale ordering flows across McDonald's restaurants.

Trade-offsSuccess CriteriaRoadmapping

McDonald's

Debugging Frequent CrashesMedium

Tests debugging methodology, root-cause analysis, and incident-style thinking.

Rollback PlanTrade-offsRisk Assessment

McDonald's

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Behavioral & Leadership10 questions · ~92 min

Explaining Your Coding Challenge ApproachMedium

Tests structured communication, technical reasoning, and self-correction while solving an algorithmic problem under pressure.

coding challengeinterview preparationProblem Solving

McDonald's

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