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Interview-grade practice for frontend developers

Recognising an answer and defending it under questioning are different skills.

Mock interview · Closures

Reasoning-first quizzes
Every option explains why it's right or wrong.
Concept genealogy
Trace any idea back to the fundamental it's built on.
AI mock interviews
Cross-questioned until your answer runs out of depth.
Spaced repetition
Whatever you fumble resurfaces before you'd forget it.