09 technologies · practice mode · no signup
Test your knowledge.
Practice real programming concepts.
Theory, code output, and debugging questions across the languages and frameworks you actually use. Every attempt sharpens a live map of what you know and what still needs work.
Choose a subject
9 availableCSS
Selectors, layout, responsive design, and modern CSS.
HTML
Semantic structure, forms, accessibility, and modern HTML.
JavaScript
Core language mechanics, from variables to the event loop.
Next.js
React framework features including routing, rendering, and server-side capabilities.
Node.js
Server-side JavaScript, APIs, modules, and runtime fundamentals.
PostgreSQL
PostgreSQL-specific features, querying, performance, and database administration.
React
Components, hooks, state, and rendering behavior.
SQL
Relational querying and database fundamentals.
TypeScript
Static types layered on top of JavaScript.
How it works
3 stepsPick a subject
Choose from languages, frameworks, and tools. Filter by topic to focus your session.
Answer questions
Theory, code-output, and debugging formats. No timers, no pressure — go at your own pace.
Track your map
Every attempt updates a live picture of your strengths and the topics worth revisiting.
Ready when you are