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Common quirks & gotchas

Computer Science · JavaScript

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About this practice set

Common quirks & gotchas is a Computer Science quiz (JavaScript) with 5 multiple-choice questions. Pick an answer and read the explanation that follows.

What you will be asked

  • == vs === differs in:
  • typeof null returns:
  • NaN is:
  • Hoisting means:
  • 0.1 + 0.2: