Arch Software Engineer Interview Questions

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

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CodingStart here. 8 questions · ~81 min

Two Sum with TargetEasy

Practice

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStrings

Arch

Linked List ReversalEasy

Practice

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

RecursionLinked ListsArrays

Arch

Synchronous vs Asynchronous ProgrammingEasy

Explain how synchronous and asynchronous programming differ, when each is appropriate, and how async improves I/O-bound throughput.

RecursionQueueStrings

Arch

Implement Binary SearchEasy

Practice

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

Recursionbinary searchArrays

Arch

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Execution7 questions · ~71 min

Design a Scalable ApplicationEasy

Explain how you would design a scalable application, including trade-offs, risks, stakeholder needs, and how you define success.

Trade-offsRisk AssessmentScope Management

Arch

Designing RESTful APIsMedium

Tests your ability to design clear, scalable REST APIs with correct tradeoffs.

Trade-offsSuccess CriteriaScope Management

Arch

Estimating Feature Delivery TimeMedium

Tests your planning skills, estimation rigor, and ability to manage scope and risk.

Success CriteriaRoadmappingScope Management

Arch

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Behavioral & Leadership10 questions · ~101 min

Raising Code Quality StandardsEasy

Tests ownership of code quality, balancing engineering standards with delivery speed, and communicating changes that improve reliability.

Stakeholder ManagementCommunicationOwnership

Arch

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