Interview questions
Preparing for a data engineering interview at Gartner? This page contains 13 real interview questions sourced from verified Gartner interview experiences. Questions are sorted by frequency — the ones asked most often appear first.
Gartner data engineering interviews typically focus on System Design/Architecture, Python/Coding, and Behavioral. There's a solid mix of fundamental and advanced questions, making it accessible for candidates at multiple experience levels.
Use the difficulty filters above to focus your preparation. For each question, attempt your own answer first, then compare with our expert solution. You can also practice these questions in our AI Mock Interview Coach for real-time feedback.
How do you handle disagreement with a co-worker?
How do you handle lack of communication from stakeholders?
Create a dictionary with list elements as keys and their occurrences as values.
Explain this code: [f(2) for f in [lambda x: x * i for i in range(5)]].
Write a swap function without if-else.
Compare PostgreSQL vs Snowflake. How do they handle duplicate record errors?
What is CTE in SQL?
Explain database drivers/connectors and their use cases.
Compare Native vs Cloud Database Systems.
Design a high-level system for a Netflix-like app.
Design an End-to-End ETL Pipeline.
How do you handle exceptions in data ingestion?
How do you optimize data ingestion?
Type or paste your answer to any of these questions and our AI Coach scores it, highlights gaps, and rewrites it at FAANG quality. Free to try.
The Data Engineering Interview Answer Vault bundles 750+ reviewed answers into 7 focused PDF volumes — SQL, Spark, Python, System Design, Cloud, Behavioral, and Data Modeling. Study on any device, no subscription required.
800+ hands-on courses — Grokking System Design, Coding Patterns, and AI mock interviews for your DE loop.
Turn any topic or your own notes into an interactive, personalized course in 60 seconds.
The book that gets data engineers through system-design rounds. Essential reading.
Some links below are affiliate links. If you buy through them we may earn a small commission at no extra cost to you — it helps keep DataEngPrep free.