Top 19
Prep plan
Updated weekly · Last refresh Aug 30

Databricks Data Engineer Interview Questions

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

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1
CodingStart here. 3 questions · ~27 min
Unit Test Spark Transformation OutputMedium
Practice

Implement deterministic validation for a Spark-style transformation by normalizing and comparing unordered row collections.

Databricks
Binary Search Implementation and ComplexityEasy

Explain how binary search works on a sorted array and why its time complexity is O(log n).

MathArraysSearchingDatabricks
Binary Search and DBMS BasicsMedium

Evaluates algorithmic thinking and foundational understanding of DBMS concepts.

Databricks
2
Pipelines10 questions · ~91 min
Handle PySpark Data SkewMedium

Approach for detecting and mitigating skew in PySpark pipelines using partitioning, join strategies, and runtime monitoring.

Data Qualitypysparkdata skewnessDatabricks
Mitigate Spark Skew in Delta PipelinesEasy

Design a Databricks Delta pipeline that detects and mitigates Spark data skew in large joins and aggregations while meeting a 20-minute hourly SLA.

Databricks
Backfill Six Months in Delta PipelineHard

Design a Databricks Spark backfill for 6 months of Delta data with idempotent reprocessing, isolation from production, and strong data quality controls.

Databricks
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3
Behavioral & Leadership4 questions · ~36 min
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4
More topics2 questions · ~18 min
Medallion Architecture for EventsMedium

Assesses your approach to structuring transformations for reliable, query-ready data products.

medallion architectureDatabricks
Window Functions for AnalyticsHard

Tests advanced SQL skills for scalable analytics using window functions.

Window FunctionssqlRunning TotalsDatabricks
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 19 questions plus 3 hands-on drills to finish this plan.