Digit88 Data Engineer Interview Questions

The questions to prepare for a Digit88 Data Engineer interview. Questions from real interview reports rank first. Updated daily.

3questions

~1htotal time

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PipelinesStart here. 2 questions · ~16 min

Explain narrow and wide Spark transformations, including shuffle behavior, stage boundaries, and pipeline performance implications.

Handling Data Skew in PipelinesHard

Design a practical strategy to detect, mitigate, and monitor data skew in batch and streaming data processing pipelines.

distributed computingInfrastructuredata skewnessDDigit88

SQL & Data Manipulation1 question + 3 drills · ~38 min

Explain the ACID properties of database transactions and their importance.

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

Filter invalid game events and normalize event names using PostgreSQL string and null handling.

Prepare valid encounter records by trimming text, excluding missing values, and removing invalid charges.

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