Resources and Practice
Comprehensive resources and practice materials for interview preparation
Study Guides & Challenges
- 🎯 2026 New Year Analytical Skills Challenge - 8-week intensive to level up SQL, stats, Python, and storytelling
- 📅 21-Day Preparation Guide - Structured 3-week study plan covering all essential topics
- 💡 Key Insights & Tips for Meta - Meta-specific advice and common pitfalls to avoid
Practice Problems
SQL Practice
- 📊 SQL Interview Problems (15 Curated) - Graded problems with full solutions in Postgres
- 📊 SQL Example Problems - Comprehensive SQL practice questions with solutions
- 🔥 Advanced SQL Patterns & Techniques - Expert-level SQL patterns and optimization techniques
A/B Testing & Experimentation
- 🧪 A/B Testing Deep Dive - Complete guide to experiment design, analysis, and pitfalls
- 🔢 Sample Size Calculator - Interactive tool with explanations
Statistics & Probability
- 📈 Statistics & Probability Example Questions - Practice problems with detailed explanations
- 📉 Real-World Data Distributions - Understanding data distributions in practice
Analytical & Case Studies
- 📊 Analytical Execution (with Full Case Study) - Complete Instagram Reels case study walkthrough
- ⚙️ Analytical Execution Examples - Additional case study walkthroughs
- 🧠 Analytical Patterns - Common analytical frameworks and approaches
Behavioral Interview
- 💬 Behavioral Interview (with 5 STAR Examples) - Complete STAR stories you can study and adapt
- 💬 Behavioral Mock Interview - Additional practice questions with sample responses
Online SQL Practice Platforms
| Platform | Description |
|---|---|
| StrataScratch | Focus on business-oriented SQL questions from real companies |
| Mode Analytics | SQL with analytical exploration and visualization |
| BigQuery Public Datasets | Practice SQL on real-world datasets |
| LeetCode | Excellent for algorithm practice with dedicated SQL section |
| DataLemur | Company-specific questions and detailed solutions |
| SQLBolt | Interactive SQL lessons with practical application |
| W3Schools SQL | Comprehensive and free resource for learning SQL |
| DB Fiddle | Test SQL queries against various database systems |
Statistical Learning Resources
| Resource | Description |
|---|---|
| Introduction to Statistical Learning | Free textbook with R code examples |
| Khan Academy | Comprehensive coverage of core statistical concepts |
| OpenIntro Statistics | Free textbook focused on real-world applications |
Data Analysis & Visualization Tools
| Tool | Description |
|---|---|
| Tableau Public | Create interactive visualizations and dashboards |
| Google Data Studio | Free tool for creating reports and dashboards |
| R with ggplot2 | Powerful language for statistical analysis and visualization |
A/B Testing & Experimentation
| Resource | Description |
|---|---|
| Trustworthy Online Controlled Experiments | Book by Ron Kohavi - A/B testing best practices |
| Udacity A/B Testing Course | Free course covering fundamentals |
| Optimizely Blog | Articles and resources on A/B testing |
| VWO Blog | A/B testing insights and case studies |
YouTube Channels
| Channel | Focus |
|---|---|
| StatQuest | Complex statistical concepts explained visually |
| 3Blue1Brown | Mathematical concepts with beautiful animations |
| Ken Jee | Real-world data science projects and career guidance |
| Tina Huang | Data science career advice and interview tips |
| SeattleDataGuy | Data science in business context |
Company Tech Blogs
Learn from how top tech companies approach data science: