Comcast Data Engineer Interview Questions

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

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CodingStart here. 7 questions · ~88 min

Build a newline-terminated left-aligned star pattern for a specified number of rows.

Star Pattern in PythonEasy

Practice

Build a left-aligned star pattern with one additional star per row and return the exact newline-formatted string.

coding challengeCodingBasic Algorithms

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SQL & Data Manipulation9 questions · ~113 min

Find the second highest distinct salary and adapt the query to retrieve any requested salary rank.

Second Highest Trader SalaryEasy

Practice

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSorting

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Compare Periods with LAG and LEADMedium

Explain how LAG and LEAD compare current rows to previous or next periods in time-series SQL analysis.

Window FunctionsLag/LeadDate Functions

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Pipelines9 questions · ~113 min

Diagnose an Integration Pipeline IssueMedium

Structured approach to diagnose failures in an ETL integration, from source extraction through orchestration, data quality, and idempotent recovery.

ToolsDependenciesQuality

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Explain ETL in Data EngineeringEasy

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

ETLOrchestrationQuality

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Behavioral & Leadership9 questions · ~113 min

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