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First Orion Interview Questions

The questions to prepare for First Orion interviews, across all roles. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 23 questions · ~230 min
Reverse a String in PythonEasy
Practice

Reverse a string in Python using character traversal and return the reversed result.

StringsfunctionspythonFirst Orion
Two Sum with TargetEasy
Practice

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

Hash TablesArraysStringsFirst Orion
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2
Execution5 questions · ~50 min
Choose Monolith or MicroservicesMedium

Evaluate the execution trade-offs between monoliths and microservices and explain how you would choose the right approach.

Trade-offsRisk AssessmentScope ManagementFirst Orion
Ensure Distributed Data ConsistencyHard

Define an execution approach for maintaining data consistency across distributed systems while balancing delivery speed, risk, and operational resilience.

InfrastructureTrade-offsRisk AssessmentFirst Orion
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3
Technical Fundamentals4 questions · ~40 min
iOS vs Android DifferencesEasy

Tests your platform knowledge and ability to make tradeoffs across mobile ecosystems.

CommunicationDealing With AmbiguityFirst Orion
Managing Memory in Mobile AppsEasy

Tests your understanding of memory usage, leaks, and performance impacts on mobile.

CommunicationOwnershipDealing With AmbiguityFirst Orion
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4
Behavioral & Leadership16 questions · ~160 min
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5
More topics2 questions · ~20 min
Clean Separation of LayersMedium

Tests ability to design maintainable mobile architecture with clear separation of concerns.

Stakeholder ManagementCommunicationOwnershipFirst Orion
Mobile Engineer ResponsibilitiesEasy

Tests your understanding of the role and how you would contribute at First Orion.

User NeedsUse CasesFirst Orion
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