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Data Engineering

510 real questions asked by candidates interviewing for Data Engineering — captured live by Assisting AI. Updated weekly.

📅 Last seen: Oct 2026 🗓️ First seen: Mar 2026 📈 Total asks: 510
510 Questions asked
Mar 2026 First seen
Oct 2026 Last seen
510 Unique questions

🥧 Difficulty mix

How hard are these questions?

510 QUESTIONS
Easy 149 (29%)Medium 330 (65%)Hard 31 (6%)

📊 Question type

Breakdown by interview phase

Conceptual 359 Coding 53 Behavioral 53 System Design 29 Debugging 14 Other 2

🔥 12-week activity

When candidates are asked these

W3042 questions in 2026-3042W319 questions in 2026-319W32W334 questions in 2026-334W348 questions in 2026-348W3511 questions in 2026-3511W3683 questions in 2026-3683W3732 questions in 2026-3732W3824 questions in 2026-3824W39113 questions in 2026-39113W4060 questions in 2026-4060W418 questions in 2026-418

Last 12 weeks →

🏷️ Top topics

Where these questions cluster

Sql 55
Spark 53
Etl 35
Python 34
Data Pipeline 27
Aws 26
Snowflake 25
Data Engineering 17

👤 Experience level mix

What seniority these are asked at

Fresher (0-1yr) 79Junior (1-3yr) 213Mid (3-6yr) 187Senior (6+yr) 31

📝 Recent questions

Latest 10 asked by candidates

🟢 Easy ✅

Can you tell me what pronouns you use?

Pronouns Diversity & Inclusion
Behavioral · Asked 1× · Oct 2026
🔴 Hard ✅

We have an environment where we process up to 10 million transactions per day and need to migrate the data from our transactional database to an analytical database like Snowflake nightly. The data is flaky, and for about 10 days a year we see higher bandwidth and throughput. How would you design the data pipeline to handle this scenario?

Data Pipeline Snowflake Etl
System Design · Asked 1× · Oct 2026
🟡 Medium ✅

What would you include in an Airflow DAG, and what would you avoid adding?

Airflow Dag Workflow Orchestration
Conceptual · Asked 1× · Oct 2026
🟢 Easy ✅

Can you explain what a DAG in Airflow is?

Airflow Dag Workflow Orchestration
Conceptual · Asked 1× · Oct 2026
🟡 Medium ✅

Can you explain how joins work in Spark?

Spark Joins Data Processing
Conceptual · Asked 1× · Oct 2026
🟡 Medium ✅

You have experience with PySpark. Could you explain the two main components of PySpark?

Pyspark Rdd Dataframe
Conceptual · Asked 1× · Oct 2026
🟡 Medium ✅

Can you explain your experience with PI Spy?

Pi Spy Data Ingestion
Behavioral · Asked 1× · Oct 2026
🟡 Medium ✅

We have a data format but we can't restrict our users to enter any particular format. How should we design our code to handle this situation?

Input Validation Data Formats Design Patterns
Conceptual · Asked 1× · Oct 2026
🟡 Medium ✅

What is the difference between an anti join and a left anti join?

Joins Spark Dataframes
Conceptual · Asked 1× · Oct 2026
🟡 Medium ✅

You have hands‑on experience with PySpark, right? How does a PySpark job execute, and how do you run a PySpark job?

Pyspark Spark Job Execution
Conceptual · Asked 1× · Oct 2026

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