Resources

Want to practice to improve your skills?

Here are some useful resources:

• AI

  • OpenAI
  • Gemini
  • Claude

 

• SQL, Python, Java, Ruby:

  • HackerRank, practice challenges ranging from beginner to hard
    • Discussion pages have tons of useful examples and different solutions
  • PostgreSQL Exercises, free site with many practice exercises

 

• R:

  • ListenData, refresher on basic R commands and data manipulation
  • Analytics Vidhya, 40 questions to test your skill on R for Data Science

 

Want to learn new skills?

Check out these tutorials & courses:

• SQL:

  • Khan Academy, free beginner SQL course

 

• Python:

  • Codecademy, free beginner course plus more advanced courses
  • edX, free beginner computer science using python, by MIT
  • Python Data Analysis, LinkedIn Learn course

 

• R:

  • Udemy, free beginner R course

 

• Computer Science:

• • edX, free beginner computer science course providing some familiarity with several programming languages, by Harvard
•