Coding interview practice in 12 languages and frameworks

480+ short, test-checked exercises for the live-coding round. Each one pairs a worked example with a twin problem you solve yourself, in a real editor, checked by tests the moment you run them. Free, no account needed to start.

Languages

• JavaScript coding interview practice: 40 exercises
• TypeScript coding interview practice: 44 exercises
• HTML & CSS coding interview practice: 40 exercises
• Python coding interview practice: 50 exercises
• SQL coding interview practice: 45 exercises
• Rust coding interview practice: 48 exercises
• C# coding interview practice: 48 exercises
• Java coding interview practice: 48 exercises

Frameworks & libraries

• Angular coding interview practice: 40 exercises
• RxJS coding interview practice: 40 exercises
• React coding interview practice: 40 exercises
• Vue coding interview practice: 40 exercises

All languages and frameworks · Dotstar, the daily regex puzzle