Interview knowledge base
Deep-dive answers with interactive simulations. Pick a category to start, or jump straight to a question from the sidebar.
Categories
JavaScript
2 questions
Core language internals — event loop, closures, prototypes, async.
Node.js
1 questions
libuv event loop, phases, streams, and runtime performance.
React
1 questions
Rendering model, hooks, reconciliation, and performance.
System Design
1 questions
Frontend architecture, data flow, and scaling patterns.