learn coding with our free and beginner friendly courses on python, java, c, c++, data structures, algorithms, sql. solve our collection of 1000s of problems to practice coding.

hackerrank is the market-leading technical assessment and remote interview solution for hiring developers. learn how to hire technical talent from anywhere!

github is where people build software. more than 100 million people use github to discover, fork, and contribute to over 420 million projects.

evaluate candidates quickly, affordably, and accurately for assessments, interviews, and take-home projects. prepare for interviews on the #1 platform for 1m+ developers that want to level up their careers.

codeforces. programming competitions and contests, programming community

a computer science portal for geeks. it contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview questions.

stack overflow | the world’s largest online community for developers

well organized and easy to understand web building tutorials with lots of examples of how to use html, css, javascript, sql, python, php, bootstrap, java, xml and more.