Real interview questions asked at EY. Practice the most frequently asked questions and land your next role.
EY data engineering interviews test your ability across multiple domains. These questions are sourced from real EY interview experiences and sorted by frequency. Practice the ones that matter most. This set leans toward the medium-difficulty band most real interviews actually live in (9 of 24). Recurring themes are bigquery, sql, and join — these patterns appear most often in real interviews and reward the deepest preparation. Many of these questions also surface at Tech Mahindra and Incedo, so the preparation transfers across companies. Average answer is around 1 minute of reading — plan roughly 1 hour to work through the full set thoughtfully.
This collection contains 24 curated questions: 8 easy, 9 medium, and 7 hard. There's a strong foundation of fundamentals-focused questions — ideal for building confidence before tackling advanced topics.
The most frequently tested areas in this set are bigquery (9), sql (7), join (7), partition (6), python (5), and spark (5). Focusing on these topics will give you the highest return on your preparation time.
Start with the easy questions to warm up and solidify fundamentals. Medium-difficulty questions form the bulk of real interviews — spend the most time here and practice explaining your reasoning out loud. Hard questions often appear in senior and staff-level rounds; attempt them after you're comfortable with the basics. For each question, try answering before revealing the solution. Use our AI Mock Interview to simulate real interview conditions and get instant feedback on your responses.
What are Airflow Operators? Give examples.
How do you remove duplicate rows in BigQuery?
Explain the difference between Azure Data Factory (ADF) and Databricks.
What are the key components of AWS Glue, and how do they work together?
What is Azure Data Factory (ADF), and what are its main components?
What is Snowflake's architecture, and why is it unique?
What is the difference between S3 and HDFS?
What is the role of AWS Lambda in a data engineering pipeline?
What is the role of the Integration Runtime (IR) in ADF?
Difference Between Internal and External Tables in BigQuery
What is the difference between OLTP and OLAP?
Describe AWS Glue components and their functions.
Reverse a string with special characters preserved.
Write Python code to remove duplicates from a string.
Explain BigQuery Architecture.
Explain Data Modeling SCD Types (Type 1, 2, 3).
How many records result from Inner Join, Left Join, Right Join given Table A and Table B?
Self-introduction including current role, projects, and key responsibilities. Focus on SQL expertise, Python skills, and experience in data warehousing and modeling.
What are BigQuery Slots?
What are the benefits of BigQuery Warehouse?
What is BigQuery Cache?
What is UNNEST and provide a query example?
What is the difference between SELECT, COUNT(*), and COUNT(1)?
Write a Merge Statement for SCD Type 2.
Get full access to 1,800+ expert answers, AI mock interviews, and personalized progress tracking.