Data Science Educational Resources
StrataScratch is a data science educational platform with over 1,000+ real interview questions from your favorite companies.
Interviews
Data Analyst Interview Questions and Answers
In this article, we will discuss top data analyst interview questions and required skills from recent data analyst interviews at top companies.
Nathan Rosidi -
5 Tips to Prepare for a Data Science Interview
Are you wondering how to prepare for Data Science Interview? This data science interview preparation guide covers tips on topics covered during the interviews.Nathan Rosidi -
HackerRank for Data Science
Let's find out if HackerRank coding challenges and their practice questions can help you prepare for your data science interview.Nathan Rosidi -
The Ultimate Guide to SQL Window Functions
This is a complete overview of the SQL window functions. Learn everything you need to know about them to excel at your job interview and an actual job.
Tihomir Babic -
SQL CTEs: Usage, Advantages, and Drawbacks
All about SQL CTEs or Common Table Expressions, their types, and usage. We will also discuss the advantages and disadvantages of using them in your SQL queries.Nathan Rosidi -
Data Architect Interview Questions You Should Be Prepared to Answer
A deep dive into conquering data architect interview questions: an in-depth exploration and strategic preparation guide for aspiring data architects.Nathan Rosidi -
How to Join 3 or More Tables in SQL
Here we’re going to talk about using a commonly required SQL concept - how to join 3 or more tables in SQL.Nathan Rosidi -
A Comprehensive Statistics Cheat Sheet for Data Science Interviews
The statistics cheat sheet overviews the most important terms and equations in statistics and probability. You’ll need all of them in your data science career.Nathan Rosidi -
An Introduction to the SQL Rank Functions
This introduction covers two of the most common SQL Rank Functions, their differences, and how to use them.Nathan Rosidi -
The Ultimate Guide to SQL Aggregate Functions
Aggregate Functions in SQL is the main tool for data aggregation and one of the most common topics when working with data.Nathan Rosidi -
Introduction to IFNULL() Function in SQL
Learn all about the SQL IFNULL() function in MySQL and PostgreSQL with the example of a hard-level Interview Question asked by Google.Nathan Rosidi -
Methods for Ranking in Pandas
Learn how to rank data in Python Pandas using different methods. We use the Airbnb, Google, and Yelp datasets for practical examples.Nathan Rosidi -