C3 AI Data Engineer Interview Questions

The questions to prepare for a C3 AI Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

24questions

~4htotal time

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PipelinesStart here. 16 questions · ~147 min

Explain how structured and unstructured data differ, and how that changes pipeline design and downstream modeling.

Privacy Compliance in Data PipelinesMedium

Approach for building privacy controls, lineage, and auditability into data pipelines that handle personal data.

Compliancedata privacyPipelines

C3 AI

Explain ETL in Data EngineeringEasy

Explain the ETL process, why it matters, and how it fits into a practical data pipeline.

ETLOrchestrationQuality

C3 AI

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Coding3 questions · ~28 min

Handle Missing Values in PythonEasy

Tests practical data cleaning skills and appropriate imputation strategies.

MathArraysData Wrangling

C3 AI

Merge Two Sorted Linked ListsEasy

Tests core coding ability and correctness for a standard algorithmic problem.

RecursionLinked ListsSorting

C3 AI

CSV to Database Python ScriptMedium

Tests ability to implement ingestion logic and interact with databases using Python.

Hash TablesArraysStrings

C3 AI

Behavioral & Leadership3 questions · ~28 min

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Hands-on SQL practiceWrite and run real queries in the editor. 1 drill · ~10 min

Rank Rocket App marketing channels monthly using joins, distinct conversion counts, CTEs, and ROW_NUMBER.

The finish line: interview-readyComplete all 24 questions plus 1 hands-on drill to finish this plan.