Data Engineering
Interview Questions & Answers
Browse 1,863+ real interview questions for free. Get expert answers in our PDF prep bundles.
From Raw Questions to Interview Mastery
Every question goes through a 5-stage pipeline before reaching you.
Real questions sourced from interviews at 97+ companies
"question": "Explain..."
"category": "SQL"
"company": "Amazon"
}
Cleaned, deduplicated, and structured into JSON
Real Interview Questions
Browse questions from real data engineering interviews at top companies.
What is a window function in SQL?
→Explain the difference between repartition and coalesce in Spark
→Design an ETL pipeline for a data warehouse
→What is data skew and how do you handle it?
→Write a query to find the second-highest salary
→What is the difference between batch and stream processing?
→Explain the medallion architecture in a lakehouse
→How do you optimize a slow Spark job?
→What is schema evolution and why does it matter?
→Tell me about yourself and your data engineering experience
→Get Expert Answers in PDF Format
Download the complete prep bundle with detailed answers, code examples, and interview tips.
Everything You Need to Get Hired
A complete interview preparation platform built by senior engineers.
1,800+ Real Questions
The largest collection of data engineering interview questions from real interviews at top companies.
PDF Study Bundles
Download complete prep bundles with expert answers. Study offline, on your commute, anywhere.
Blog & Guides
In-depth interview guides, company-specific tips, and preparation roadmaps for data engineers.
AI Interview Coach
Practice with an AI that simulates real interviews, evaluates answers, and gives feedback.
Quiz Mode
Timed flashcard-style recall practice. Self-assess, track progress, and build real confidence.
Dashboard & Analytics
Track your progress, streaks, and see where your knowledge gaps are.
Success Stories
Engineers who practiced these questions got offers at
Loved by Engineers at Top Companies
“Used this for 2 weeks before my loop. Got the offer. The frequency data alone is worth 10x the price.”
“The question coverage is incredible. Felt like I'd seen every question before walking into the interview.”
“Best DE interview resource I've found. The architect-level answers teach you how to think, not just what to say.”
“The system design questions are exactly what Netflix asks. Got promoted within 6 months of using it.”
“The company-specific question sets are brilliant. Practiced Goldman questions for 3 days and nailed every round.”
“Finally a resource that doesn't treat data engineering like a subset of software engineering. Real DE questions with real depth.”
7 Core Topics
Every question category you'll face in a data engineering interview.
SQL
Window functions, CTEs, joins, optimization
Spark/Big Data
RDDs, DataFrames, partitioning, tuning
System Design/Architecture
Pipelines, streaming, fault tolerance
Python/Coding
Algorithms, PySpark, pandas, ETL scripts
Cloud/Tools
AWS, GCP, Airflow, Snowflake, Databricks
General/Other
Data modeling, warehousing, fundamentals
Behavioral
STAR method, leadership, career goals
Free: Top 20 SQL Interview Questions (PDF)
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PDF Prep Bundles
Expert answers for every question. Download and study offline.
- ✓ 810 questions across 3 volumes
- ✓ SQL, Python & Behavioral
- ✓ SQL Window Functions cheat sheet
- ✓ PDF format - study offline
- ✓ All 1,863 questions - 7 volumes
- ✓ Spark, System Design & Cloud
- ✓ Company-wise index (97+ firms)
- ✓ SQL Window Functions cheat sheet
- ✓ Everything in Professional
- ✓ Unified master PDF + navigation
- ✓ Opus-enhanced architect blueprints
- ✓ Lifetime updates - quarterly
The Complete Data Engineering Mastery Kit
Course material, hands-on assignments, resume templates, AI interview coach, and the full 1,863 Q&A library - one bundle for the complete DE career roadmap.
Frequently Asked Questions
What's in the PDF bundles?
Real data engineering interview questions with expert-level answers covering SQL, Spark, System Design, Python, Cloud, and Behavioral topics. From $21.
Can I browse questions for free?
Yes! All 1,800+ questions are free to browse. Answers are available in our PDF bundles or the upcoming full platform.
What makes this different from LeetCode?
We focus exclusively on data engineering - SQL, Spark, pipeline design, cloud tools. Every question is from real DE interviews, not generic coding problems.
How often is the content updated?
New questions are sourced from real interviews and added quarterly. Elite bundles include lifetime updates.
What about the full platform?
The full platform with AI Interview Coach, quizzes, and dashboard is coming soon. Sign up to get notified when it launches.
What companies are covered?
Questions from Amazon, Google, Databricks, Snowflake, Meta, Netflix, Microsoft, Stripe, and 50+ more companies.
Ready to Ace Your Interview?
Browse real questions from Amazon, Google, Databricks, and 95+ more companies. Get expert answers in our PDF bundles.