Top 26
Prep plan
Updated weekly · Last refresh Oct 17

Tendo Data Engineer Interview Questions

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

26questions
~4htotal time
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1
CodingStart here. 3 questions · ~28 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
Practice

Implement a linear array-sum solution and explain why its time complexity is O(n).

CodingMathArraysTendo
Deduplicating Large DatasetsMedium

Tests your ability to design scalable deduplication for large data volumes.

Hash TablesArraysSortingTendo
2
Pipelines19 questions · ~177 min
Combine Multiple Sources Into One DashboardMedium

Design a pipeline that combines multiple source systems into one dashboard with consistent joins and clean model layers.

ETLData ModelingQualityTendo
Handling Pipeline Errors at ScaleHard

Approach for stabilizing an automated workflow that is failing broadly, with focus on orchestration, data quality, idempotency, and rollback.

IdempotencyBackfillingQualityTendo
Preferred ETL and Transformation ToolsEasy

Explain your preferred extraction and transformation stack, and the reasoning behind those tool choices.

ToolsETLELTTendo
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3
SQL & Data Manipulation4 questions + 3 drills · ~67 min
The finish line: interview-readyComplete all 26 questions plus 3 hands-on drills to finish this plan.