60 seconds. go go go ⚡

Speed round

Answer as many questions as you can in 60 seconds. Streaks build a combo multiplier; a wrong answer costs you 3 seconds. Can you beat your best?

Pick your arena
your best here—
+10 per answer · combo ×2 after 3 in a row, ×3 after 6

Why a speed round helps

The first minutes of a technical interview are often quick-fire checks: what typeof null returns, what a snippet logs, which hook runs after render. The speed round trains that fast, confident recall.

  • The rules. You have 60 seconds. Three correct answers in a row double your points and six in a row triple them. A wrong answer resets the combo and costs 3 seconds.
  • Accuracy before speed. A guess that misses costs you time and your multiplier. Answer what you know instantly and take a breath on the rest.
  • Beat your best. Your best score is kept in this browser. When a topic feels easy here, try its mock interview, where you explain the answer instead of picking it.

Warm up first with a chapter's MCQs and their explanations:

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