Top 10
Prep plan
Updated weekly · Last refresh Sep 22

Areli Data Engineer Interview Questions

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

10questions
~2htotal time
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1
PipelinesStart here. 6 questions · ~58 min
ETL for Rate-Limited API LogsHard

Tests your ability to build resilient ETL pipelines with backoff, retries, and reliable ingestion.

SchedulingETLBatch ProcessingAreli
Idempotency for Safe BackfillsMedium

Tests your understanding of idempotent processing and its role in reliable backfills.

IdempotencyBackfillingQualityAreli
Diagnosing Silent Pipeline FailuresMedium

Tests your incident diagnosis skills and your ability to implement effective monitoring and alerting.

InfrastructureOrchestrationQualityAreli
Cost-Efficient Real-Time DashboardsHard

Tests your ability to design low-cost real-time data serving for operational analytics.

InfrastructureStream ProcessingQualityAreli
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2
SQL & Data Manipulation3 questions + 3 drills · ~59 min
Dimensional Model for Retail SalesHard

Tests your ability to design dimensional models that support efficient analytical queries.

JoinsData WranglingAggregationsAreli
Top 3 Products Per CategoryMedium

Tests your SQL windowing and ranking skills for grouped top-N queries with ties.

Window FunctionsRankingAggregationsAreli
Optimize a Slow QueryHard

Tests your approach to diagnosing and improving SQL performance on large datasets.

JoinsData WranglingCTEsAreli
Top 3 Products Per RegionMedium
Practice
Practice drill

Rank Abbott medical device products by regional unit sales using joins, aggregation, date filtering, and ROW_NUMBER().

JoinsRankingAggregationsAreliAbbottAquent Talent
7-Day Rolling Active UsersMedium
Practice
Practice drill

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
3
More topics1 question · ~10 min
The finish line: interview-readyComplete all 10 questions plus 3 hands-on drills to finish this plan.