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The output of a NAND gate is LOW if ________.

  • A.all inputs are LOW
  • B.all inputs are HIGH
  • C.any input is LOW
  • D.any input is HIGH

Answer: B

Correct answer: all inputs are HIGH

NAND is the complement of AND, and AND is 1 only when every input is 1. So NAND is 0 in exactly that case and 1 in all the others.

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