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Tendo Interview Questions

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

39questions
~6htotal time
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1
CodingStart here. 3 questions · ~25 min
Merge Two Sorted Linked ListsEasy
Practice

Merge two sorted singly linked lists into one sorted list by relinking existing nodes.

RecursionLinked ListsSortingTendo
Explain Time ComplexityEasy

Tests ability to analyze algorithm efficiency and communicate tradeoffs.

MathArraysTendo
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2
Pipelines21 questions · ~178 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityTendo
Data Integration Tools ExperienceEasy

Discuss the data integration tools you have used and how they fit into ETL, orchestration, and data quality workflows.

InfrastructureToolsETLTendo
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3
SQL & Data Manipulation4 questions + 3 drills · ~64 min
4
Execution3 questions · ~25 min
Refactoring for 10x ScaleMedium

Tests scalability planning, performance bottlenecks identification, and refactoring strategy.

Trade-offsscalabilityResource AllocationTendo
Rate Limiting and Service DegradationMedium

Tests resilience engineering, traffic management, and graceful degradation strategies under load.

Trade-offsTechnical FluencyRisk AssessmentTendo
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5
Behavioral & Leadership7 questions · ~59 min
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6
More topics1 question · ~8 min
HIPAA-Compliant API DesignHard

Tests secure API design for HIPAA compliance, data protection, and third-party integration risks.

APIsSecurityCloudTendo
The finish line: interview-readyComplete all 39 questions plus 3 hands-on drills to finish this plan.