Data Science Educational Resources
StrataScratch is a data science educational platform with over 1,000+ real interview questions from your favorite companies.
Guides
How to Replace a Character in a Python String
There are several ways to replace a character in a Python string. In this article, you’ll learn three main techniques and how to use them in practice.
Nathan Rosidi -
Mastering Loop Iterations: Python For Loop Index Explained
Use Python's for loop index to manage data efficiently, improve performance, and ensure smoother processing, especially with large datasets or complex tasks.Nathan Rosidi -
A Complete Guide to Quick Sort Time Complexity
Quick Sort: A fast algorithm that improves time complexity using pivot-based partitioning and recursion by carefully selecting pivots and structuring the array.Nathan Rosidi -
How to Use ChatGPT in Your Data Science Workflow
Data science workflow can be quite overwhelming. Why don’t you take some load off and free up some of your time by harnessing ChatGPT to work for you?Nathan Rosidi -
PySpark SQL Functions: Boost Big Data Processing with SQL
Leverage PySpark SQL Functions to efficiently process large datasets and accelerate your data analysis with scalable, SQL-powered solutions.Nathan Rosidi -
Semi-Supervised Learning: Techniques & Examples
Semi-supervised learning uses both labeled and unlabeled data to improve models through techniques like self-training, co-training, and graph-based methods.Nathan Rosidi -
Basic Data Structure Types You Must Know
Master essential data structures like linked lists, stacks, and queues to efficiently manage dynamic data and boosting your overall programming efficiency.Nathan Rosidi -
Using Visualizations for Your Exploratory Data Analysis
No data science project should skip the exploratory data analysis stage. Enhance it with the five data visualization types we’ll show you in the article.Nathan Rosidi -
Counting Distinct Values in SQL: Tips and Examples
Using SQL COUNT(DISTINCT) is an easy way to count distinct values in SQL. However, it has its own quirks, which we’ll explain (with examples) in this article.Nathan Rosidi -
Python Libraries for Data Clean-Up
Data cleaning is an integral part of every data science project. This tedious but essential task can be much easier if you start using these Python libraries.Nathan Rosidi -
How to Get the Index of an Item in a List in Python
Master Python's index() function to efficiently locate items in lists, handle errors with custom functions, and improve data analysis using advanced techniques.Nathan Rosidi -
Data Science Degrees vs. Certification Courses: Which is Right for You?
People typically learn data science by getting a university degree or taking a certification course. But which one is right for you? The article answers this question.Nathan Rosidi -