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Updated weekly · Last refresh Oct 17

Ahu Technologies Data Engineer Interview Questions

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

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1
SQL & Data ManipulationStart here. 3 questions + 2 drills · ~48 min
Top Customers by Sales RevenueEasy
Practice

Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.

RankingGroup ByAggregationsAhu Technologies
Handling Missing ValuesEasy

Tests your data quality judgment and practical SQL or transformation strategies.

Data WranglingCase WhenAggregationsAhu Technologies
Top Three Active UsersMedium
Practice
Practice drill

Write a query utilizing window functions such as ROWNUMBER or DENSERANK to identify the top three active users per region over the last quarter. Treat use...

Window FunctionsDate FunctionsData ManipulationKKhan Cloud SolutionsCClioAhu Technologies
Second-Highest Value QueryEasy
Practice
Practice drill

Find Platform's second-highest distinct transaction value using a join, DISTINCT, and DENSE_RANK in PostgreSQL.

SubqueriesRankingAhu TechnologiesEPAM Systems
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2
Pipelines19 questions · ~177 min
Version Control for Code and DataEasy

Explain how to version pipeline code and datasets so teams can collaborate, reproduce results, and track changes safely.

Data QualityToolsversion controlAhu Technologies
Design Real-Time Operations Dashboard PipelineHard

Design a pipeline for a real-time operational dashboard, covering streaming ingestion, modeling, data quality, and dashboard serving.

InfrastructureStream ProcessingQualityAhu Technologies
Star vs Snowflake SchemaEasy

Compare star and snowflake schemas in a warehouse pipeline, including structure and transformation trade-offs.

snowflake schemastar schemaData ModelingAhu Technologies
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3
Coding3 questions · ~28 min
Deduplicating Records FunctionEasy
Practice

Remove duplicate Hilton Grand Vacations records by identifier while preserving first-seen order using a hash set.

Hash TablesArraysSortingAhu Technologies
Unit Tests for Data TransformationsMedium

Tests your testing strategy for correctness, edge cases, and maintainability of transformations.

RecursionHash TablesArraysAhu Technologies
Sorting Large DatasetsHard

Tests your algorithmic thinking and ability to design out-of-core or distributed solutions.

ArraysSortingHeapAhu Technologies
The finish line: interview-readyComplete all 25 questions plus 2 hands-on drills to finish this plan.