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X Development Interview Questions

The questions to prepare for X Development interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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~6htotal time
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1
CodingStart here. 3 questions · ~25 min
String Reverse ExplanationEasy
Practice

Reverse a string while preserving every character, using Python string operations or a linear scan.

string manipulationX Development
Supply Chain Inventory Data StructureHard

Tests your ability to design scalable in-memory structures with fast updates and queries.

abstractionData Structuresperformance analysisX Development
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2
Machine Learning6 questions · ~51 min
3
Execution3 questions · ~25 min
Balance Debt and Feature DeliveryMedium

Explain how you prioritize technical debt versus feature work while aligning stakeholders and protecting delivery speed.

Trade-offsScope ManagementPrioritizationX Development
Backend for Real-Time Grid SimulationHard

Tests your backend architecture skills for real-time simulation workloads and system reliability.

Trade-offsTechnical Fluencysolution designX Development
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4
Pipelines3 questions · ~25 min
IoT Telemetry Ingestion PipelineHard

Tests your ability to architect high-throughput, reliable pipelines for large-scale IoT telemetry.

Stream ProcessingmonitoringETLX Development
Satellite Imagery Geospatial PipelineHard

Tests your ability to build end-to-end pipelines for geospatial ingestion, processing, and serving.

data integrationtransformationsOrchestrationX Development
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5
System Design8 questions · ~67 min
Handling Missing ModalitiesHard

Tests your robustness strategies for real-world multimodal inputs where sensors or text may be unavailable.

Model ServingX Development
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6
Behavioral & Leadership21 questions · ~177 min
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The finish line: interview-readyComplete all 44 questions to finish this plan.